yashsingh1/xdaforums huggingface dataset:
[T-Mobile, Samsung Galaxy SIII] CousinMikeyP:
Thanks

Now do I just add/copy those codes at the very bottom of build props?

Or is there a special place where i need to look and put them in?

Thanks again Doc.
[T-Mobile, Samsung Galaxy SIII] blink515:
I didn't think modems from different carriers were compatible with each other. It's stated in op to only flash on tmobile devices. If I'm wrong then flame away.

---------- Post added at 07:45 AM ---------- Previous post was at 07:41 AM ----------

Most of those build.prop lines should already be in there and don't need to be added at the bottom. Depending on the rom you have installed the value may already be set correctly by the rom developer. Anyways, if you do change them let us know if your speeds improve.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
In the stock rom only hsxpa and gprsclass are there. Edit those and add the other two. Shouldn't matter where as long as you leave a blank line at the bottom.

I usually just keep em together though.
[T-Mobile, Samsung Galaxy SIII] sojuboi69:
I need help! Whenever I try to save my build.prop, it says error occured while saving. I updated my binary but I don't know how to Mount /system to r/w. Help ?
[T-Mobile, Samsung Galaxy SIII] aristo2jzgte:
No im on my t999 device! im going to try redownloading it again and see what happens! Btw im running hells fire jb rom!
[T-Mobile, Samsung Galaxy SIII] daniel60104:
It bootlooped for me once but now it works dandy. On CM10 btw.
[T-Mobile, Samsung Galaxy SIII] bikrame:
Doc I m in Long Island ny which supposed to have Hspa42+ . But I never get more than 10 mbps per second.

How do I tweek my build.prop to get higher speed over here?
[T-Mobile, Samsung Galaxy SIII] TomTcom:
You need to use a file explorer that allows you to mount the file system "/system" as r/w. I use Anttek explorer. Others use a variety of root file explorers.

So when you have the appropriate file explorer, navigate to that file system and either you have an option to mount as R/W or a long press or something to that effect. Then edit your file and save it. After a reboot or timeout in the application it may automatically mount itself back to R.

Hope this helps out.
[T-Mobile, Samsung Galaxy SIII] sojuboi69:
yeah thats exactly what i need help on... how to mount the system as r/w ?

and what does r/w stand for ?

p.s i also downloaded anttek so if you could, i think you should just give me instructions through that. thanks :)
[T-Mobile, Samsung Galaxy SIII] ridobe:
I don't use anttek (root explorer) but essentially, r/w is read/write. By default when you open a file explorer it is r/o or read/only. Don't know how to toggle it in anttek but that is all you need to do. You will need root permissions in order to do this in the /system folder.
[T-Mobile, Samsung Galaxy SIII] psykhotic:
IMEI SV went from 06 to 07 when flashing UVLJ4, normal?
[T-Mobile, Samsung Galaxy SIII] sojuboi69:
Yeah so I'm wondering how do I Change myself to r/w? I'm Rooted to and idk what to do
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Yup. Its normal. It usually will change when you flash a modem. Stands for IMEI Software Version.

In most root capable browsers it should be pretty easy to do either through a menu option or a toggle on screen. I use root explorer and the buttons at the top.

On a side note, and please don't take this the wrong way, but are you sure you are comfortable doing all of this stuff? Flashing modems and performing build.prop edits are for the most part fairly safe, but if you move on from here I'm worried you might really mess up your phone. R/W, R/O are the type of things you should really have a good understanding of before you even try to gain root as they are directly related to what rooting allows you to do. I'm not trying to be insulting or anything like that. I think its great if you want to learn this stuff. I'm just saying you should probably have the basic knowledge down before you really dive in.

I'm pretty sure I've stated it in the post, but if you edit the wrong line or make certain changes to the build.prop it can cause the phone to stop booting. This is often easily fixed, but not knowing what a lot of the terminology is will make it harder for people to help you, and you will find that a lot of them won't even want to bother trying to. Not knowing what R/W means (even after being told it stands for read/write), only makes it look like you are going to need someone to walk you through every single step click by click explaining what every click is for and why you have to do it. This isn't the type of help you should expect to find here and you will save a lot of time and frustration for yourself and others if you don't.

I'm sorry for the long response, but I really think it possible that you could be headed for a bricked phone if you continue. At this point I just feel that saying this is the best possible way to help you. I just hope you are able to see it this way as well and that I am not trying to talk down to you or anything like that.

Good Luck!
[T-Mobile, Samsung Galaxy SIII] sojuboi69:
Haha Frick.. cause all I wanted to do was make my data speed faster because Honolulu got updated.. shucks
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
I kind of got that impression. I am sorry if that sounded harsh but I mostly wanted to make sure you are aware of the risks involved with doing this type of stuff. But I also wanted to make the point that while xda is a fantastic place to learn and grow, its not exactly the best place to start from. This phone is just too expensive for me not to.

Now, provided you are still willing to take the risk AND do a lot of the basic homework yourself, I and a host of others would be very willing to help you out. By basic homework I mean taking the time to figure something out on your own as best as you can. For example, your questions about r/w (read/write) could've been answered by a quick google search. Then you wouldn't have to ask yet another question, adding to the time it takes for us to help you reach your goal. Additionally, there are quite a few threads here on xda and elsewhere dedicated to helping people get their feet wet, so to speak. Just search beginners guide to root, or noobs guide to...., etc. Many even invite the most basic of questions so if you're just stumped you can ask there. Its the willingness and ability to do this stuff on your own that can carry you far in this forum. If you're not willing to do this on you're own, eventually someone will get downright nasty towards you.

Many of us love to help people out. But it does get to be a little frustrating when when someone seems to expect us to run down everything step by step even to the point of wanting us to define the definition just given.

That being said, if you still want to try this and I haven't horribly offended you, then try to get as far as you can on your own and then we can go from there. I would suggest searching out a good beginners guide to root/android/xda to bookmark as a reference. Then reread the op and search the thread for any specific questions.

It may seem a daunting task at first, but if you are willing to do the stuff I mentioned you will find you hardly ever need to ask much of anything anymore!

I do hope this helps.
[T-Mobile, Samsung Galaxy SIII] bikrame:
Bump
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Backup original build.prop to external sdcard first!

Open /system/builb.prop in a text editor.

Find ro.ril.gprsclass=10 and change to 12

Find ro.ril.hsxpa=1 and change to 3

Add ro.ril.hsdpa=24

Add ro.ril.hsupa=6

Save your changes, reboot and test.
[T-Mobile, Samsung Galaxy SIII] razielpr:
Doc how can i increase reception let me explain with my wife's blaze I get 4g in every part of the house with my s3 only in the livingroom i want to use my s3 in my bed not use the blaze don't like the smaller screen.so my problem is reception.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Try toggling airplane mode on and off.

Otherwise the Best I can tell you for that is to try the different modems.

Everyone has a different 'best' one. I'm not really sure of any tweaks like the ones I've listed that would make a difference for reception.

You could try adding ro.ril.hep=1 to your build.prop. no one really seems to know it purpose so you could get lucky!

But id just start testing modems to see if you get any improvement.
[T-Mobile, Samsung Galaxy SIII] kimbo1986:
I thought this deserved some screen shots.

I am running wickedv6

I checked several different modems and settled on UVJLI4 for pure speed reasons, i did a few speed tests and out of the ones I did, i took a ss of the best one for the location i am at. I then added the build.prob tweaks as recommended without ever moving from the exact location, rebooted and did the speed test again, I did about 3, and they were all around the same, give or take 500kb.

So with that said, as you can see the build.prop tweaks seemed to have given me a 10000kbps boost, at least in that spot where i was parked

Very happy with the results, thanks doc!

Question, i work in the new hspa42 area but live in a 24 area, will the 42+ build prop tweaks negatively affect the speeds in my area?

Sent from my SGH-T999
[T-Mobile, Samsung Galaxy SIII] razielpr:
Ok thanks will try to see what i get. It's annoying to see my wife's blaze getting better reception than my S3
[T-Mobile, Samsung Galaxy SIII] ohliu:
Does anyone know why the Canadian radios don't work on the T-Mobile T999? I'm using a T999 bought from the States paired up with a tmo radio on Wind Mobile in Canada, but my problem is that with the tmo radio (I've tried all of them) my phone cannot ever enter roaming mode! It's been very frustrating for me because now whenever I have very weak signal or when I lose signal on Wind, the phone just enters network search mode and I simply don't get any calls! I've tried to manually search for networks, but it just would not allow me to connect to anything even though it detects the different carrier networks. And when I try to flash the Canadian radios on either stock or AOSP based roms, I simply lose my IMEI and lose connection altogether. Please help! Thank you dearly my friends!
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Dude! That is awesome!!! Thank you for sharing the info! Like Ive said, this was all mostly theoretical in that logically it should work, but you just can't know for sure with these things!

I've got more testing to do on mine, but so far its looked good. And a 10Mbps increase is pretty significant!

That is an excellent question that I don't know the answer to unfortunately. Its going to need testing to know for sure. IIll have to plug in the +42 numbers and see what happens on mine. Will try to do that tomorrow. (I don't have +42 here, but I should still be able to see what effect it'll have)

If there is a significant differance I can probably put together a script you can run that will sort of change your build.prop on the fly. Just run the script whenever you change areas. Unless anyone else can think of a better way.

Don't think I mentioned it earlier, but check the map in post 2 to see if anyones posted their best modem in your area. The fastest one may not be the same one for best reception, but it could be a good starting point.

I know it can be time consuming and a bit of a hassle, but unfortunately its the best way I know of to do this.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
All I can think of is either the radio hw is slightly different, or its got something to do with the firmware for tmobile.

Don't expect this to work but here's a couple things you can try.

Get a build.prop from a Wind phone (either download the fw or ask someone for theirs) and anywhere you see something about tmobile in yours, replace the value with the one from Wind. For example, where yours says d2tmo and T999, change to d2can and T999V. Alternatively, just copy the whole Wind build.prop over. (Back yours up to external sd first, if phone won't boot, use twrp recoveries built in file manager to copy the original back)

Find all the radio/ril files you can and replace them with Wind files. Ill try to get a list for you, but there will be libs, modules and probably more.

Try flashing the Wind firmware to your phone. I don't usually recommend this, but you should be ok doing so. They both have the same partition layout, so it shouldn't brick.

WARNING!!! To my knowledge, no ones done this before. I cannot guarantee it will work or that it won't seriously mess up your phone! At your own risk!

If none of this works, all I can really figure is the problem lies in another partition we know very little, if anything, about. We can mess with swapping them, but I really don't suggest doing so unless we know more.

Sorry I don't have an easy or even definitive answer for you on this.
[T-Mobile, Samsung Galaxy SIII] ohliu:
Thanks for your tips! I've actually already tried flashing the Wind firmware prior to your help. Odin wouldn't let me though for some reason. Maybe I didn't do it right or something. I'll try that again plus the build.prop hack. I've got my fingers crossed. A big thank you again for trying to help me. I appreciate that.
[T-Mobile, Samsung Galaxy SIII] RaymondPJR:
What could this really mean for us on TMob. I'm taking it to mean that TMOB can have more customers on HSDPA+42 and not experience any slowdowns. It doesn't mean HSDPA+42 would be any faster, does it (result in faster speeds even though it is still HSDPA+42)?

EDIT: i think what I really meant to ask is if we could theoretically see speeds closer to the max of +42 which someone said we could never really get?:eek: http://www.theverge.com/2012/10/23/3545014/mit-researchers-increase-bandwidth-coded-tcp
[T-Mobile, Samsung Galaxy SIII] electech_poc:
how do we edit/backup build.prop

doesn't really say how to in OP or Post #3

sorry for the noob ?
[T-Mobile, Samsung Galaxy SIII] Beniuec:
You have to be rooted and download ROM toolbox from Google play there is a build.prop editor in it that's the easiest way
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
HSPA+42 will both increase speed and allow for more load without slowing down. The proof of this can be seen in the many speed tests people have done. Many in current +42 markets easily are able to get 13-17 Mbps downlink (numbers are from memory, not an actual average btw). (Over 21 is impossible on HSPA+21) Not to mention that we have seen some people get peak speeds of up to 27-30 Mbps. The technology used is called DC-HSPA, or Dual Carrier, or Dual Cell....It basically uses two carriers (tower connections as I understand it, not T-Mobile plus AT&T...I could be wrong here).

The primary goal of DC is increased downlink speeds.

We will never get the advertised speeds on any network, because the speeds they advertise are the theoretical max that the given technology could handle. They are simply advertising the technology they use.

That article you linked to is interesting, and Im glad you shared it. But it doesnt really have anything specific to do with HSPA+42. It does appear that it could be used in ANY network where losses occur to increase speeds. (EDGE, 2G, 4G, WiFi, LTE, etc). It would not have any real effect on networks that suffer from no losses, which are quite rare. It basically provides for a significant reduction in re-transmissions. Pretty cool stuff!

And with this technology, yes, we could see much closer to the theoretical speeds of any given network technology!

Is that what you were asking?
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Check this post a couple pages back.

http://xdaforums.com/showpost.php?p=33130191&postcount=250
[T-Mobile, Samsung Galaxy SIII] RaymondPJR:
It seemed to me as the author was saying all networks currently suffer from loses no matter if they are edge to LTE. So, I think what you said better than he is that with this technology, we can see closer to the theoretical speeds on HSDPA+ (provided TMOB is one of the companies that has chosen to license it.) It has got to be good news for us since we can't ever have LTE with this current model of phone and good news for TMOB since they have so many spectrum issues.

EDIT: Nope, lookes like I read too much into what he said, lol! Didn't really say anything about how often dropped packets occur. We'll just have to see how much this helps anyone, whether it means an ability for a network to handle more traffic, or increased speed, or both.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Well you can pretty much expect to see losses on just about any network you will ever use. What I took away from the article was that just about every IP based network could benefit quite a bit from this technology. I would imagine that once vetted, we will see it or something like it start to be used everwhere, and it could even become part of a new/updated standard.

This of course will take time. I don't really expect to see it benefiting us all that much though. I doubt it would require any new hw on our phones but it certainly would require them to have the software/code needed to put it to use. Meaning we would require a maintenance update. But I think any company would hold out in order to promote it as a new feature selling point for new phones. Wed have to try to port it over to ours on our own most likely.

We would still benefit as a side effect of sorts though. As it is implemented the overall network will become quicker and more efficient, leading to faster data even for us. I'm just not sure if it'd be noticable or not without a device that has the tech already coded in. I'm guessing not, at least untill the number of capable devices increases on the network.
[T-Mobile, Samsung Galaxy SIII] chargedbird:
really quick question:

will these modems work on the i9300 (International Version)?
[T-Mobile, Samsung Galaxy SIII] RaymondPJR:
Lol! TMOB has a network in France and maybe England too, but still he should know better. I don't think it's necessary to say TMO USA as everyone pretty much knows European modems won't work over here and vice-versa.
[T-Mobile, Samsung Galaxy SIII] Wildchld:
To answer your question is I'm not sure because of the partition size. I know my gnex I can use EU or USA modems. Your best bet would be to ask in the i9300 thread. If the modem.bin is the same size I would say it works but your better off using the PC Odin to flash as it has more checks than flashing and will keep you from bricking.
[T-Mobile, Samsung Galaxy SIII] karmendc:
Borked it. =[

so this morning (running CM10 10/27 nightly with T999UVLH2 baseband) i decided to try a couple of new ones (UVDLI8 and another one) and ever since then, my data connection is totally screwy. It will say H+, but data is slower than on Edge. I've tried wiping completely, ive tried flashing the original baseband, i've tried restoring from my clockwork backup...but nothing will fix the data issue.

what should i do? any suggestions?? This is hugely upsetting, haha.
[T-Mobile, Samsung Galaxy SIII] DigitalUnderground:
When you say you restored from cwm backup, do you mean a partial restore or a full restore of data/system/cache/boot?

What kind of speeds are you getting? Because it sounds like you may be throttled
[T-Mobile, Samsung Galaxy SIII] karmendc:
Hey! Thanks for the quick reply... yeah when I said cmw restore I meant a full restore with data, settings etc... my phone is actually connecting now (yay!) But the connection will go down intermittently...and its still kind of slow...especially when it tries to go from 3g to H+, it will now take almost 4 full seconds. I did a speed test to show you. What does throttled mean? Is there a time frame after flashing a new baseband that you should expect to wait before the phone works at full capacity or is it at 100% right out of the gate?

I really wanna play around with radios but I don't know the proper flashing procedure other than to clear my cache beforehand.

The images are speed tests. The first one (slow) is from just now and the other is from this morning before flashing the baseband.

Thanks in advance for your help!
[T-Mobile, Samsung Galaxy SIII] DigitalUnderground:
Those speeds don't look too bad. Maybe the network has high traffic or the weather could be bad. I fluctuate about the same speeds depending on my area.

Flashing radios is easy. Wipe... flash... wipe... :good:. Just make sure it's the right modems for your phone (as I tried to explain to crabby pants a few posts ago). Its quick and simple. Try them all because user experience varies depending on your area.

Also, Doc posted build.prop edits that you can do to also try and increase speeds.

Play around with it and give it a few days... good luck to ya
[T-Mobile, Samsung Galaxy SIII] karmendc:
Should I be worried about the fact that it takes my phone a few seconds longer than usual to wake up from 3g to H+?

Also since cm10 is jb based, does it matter if its a ICS baseband? Or is it better to stick with only JB basebands?

Thank you so much dude, seriously. You're always helping people out and i appreciate it.
[T-Mobile, Samsung Galaxy SIII] DigitalUnderground:
I notice my phone only goes to 4g/H+ when needed... it helps with the battery. If yours takes a while, then that is a little uncommon. It may take 2-3 seconds so I wouldn't worry.

Ive used ics modems on cm10 and it worked fine... im assuming vice versa works also. Im pretty sure I read that it is just phone specific, and they are called ics/jb modems because thats the leak/software they came out on.

Thanks for the kind words too bro. Hope it works out for you. :D
[T-Mobile, Samsung Galaxy SIII] reinbeau:
Thread cleaned

Please ask - and answer! - questions without name calling. Doing so will draw my attention, which might mean you earn an infraction against your account. If your post has disappeared, consider yourself warned.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
I don't use CM10 (just prefer TW personally), but as to your issues from a couple posts up, where it seems to be taking longer to jump from 3G to H+, this is actually fairly normal. Yours may be a little longer than it should be, but its not unheard of. Im not sure where in CM10, but there should be a Network setting where you can choose to use WCDMA Only, WCDMA/GSM Auto, or something like that. Switch to WCDMA Only and see if that helps. With this setting though, you will most likely just lose your data connection altogether if you go out of a 3G area, whereas with the other setting, you will drop to E or G.

Looking at your screenshots, your ping times are actually very good, and this is where you will see the greatest effect from it taking longer to jump from 3G to H. Often you can see 700-1200ms response times, due to the time it takes to make that transition. As for the download and upload speeds, you are actually right in the range you should be. When you got the 12Mbps, you probably had a good signal at a time when the network was under less of a load. (or could just be due to the speedtest app itself, i mention some about this in the 2nd post i think). If you are on the HSPA+21 network, then you should probably expect speeds around 6-10Mbps, depending on different factors. 12Mbps is actually at the high end of what you can sometimes expect to get. I hope that makes sense.

Also, it could always be tmobile/network related. If they are having an issue with a tower or are working on it, or refarming your area, it could cause any number of side effects.

Did you toggle airplane mode on then off again before running your speed tests? This can make a difference as well.

To your question about the JB vs ICS modems. GalaxyS3Guy is correct, they are only referred to as a JB or ICS modem due to the build they came from. You can flash ANY modem, on ANY rom, ANY build! As long as you are using a model SGH-T999 phone.

You also shouldn't need to wipe anything when flashing a modem. I usually don't, but some are just more comfortable wiping cache/dalvik first and/or last. I leave this up to you.

I hope this helps! Let us know if things improve.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Thanks for helping out! :highfive:
[T-Mobile, Samsung Galaxy SIII] DigitalUnderground:
I got your back Doc. :D

Thank YOU for the thread. I owe my awesome speeds to you bro.