yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab  Android Development] rangercaptain:
SimpleMobile sim will put you on t-mobile network. They rent the network from t-mobile. To use their voice and data plan ($70) you will have to use the switch exactly the same way. I tried it and liked it, but it was the same cost as my t-mobile plan.
[Galaxy Tab  Android Development] ramy911us:
cmon guys,its been a long time since anyone have made an app with this method,this is lame,,,and of course kudos 2 OP.
[Galaxy Tab  Android Development] rangercaptain:
Why don't YOU make it better? What was the value of your post?
[Galaxy Tab  Android Development] jay_jay_n:
curious does anybody else have reception issues?? some times my reception is really bad compared to my hd2 unsure if its because of the modem or just the reception.
[Galaxy Tab  Android Development] jphilpot:
Rangercaptain.

Not sure what i am doing wrong but do i have to have a prepaid simcard or other simcard rather then the one that came with my tab? I get the not allowed to make outgoing calls msg unless i use my wifes sim?

I just dont see a clear answer about it on this thread, but makes since i would have to have a sim with voice
[Galaxy Tab  Android Development] rangercaptain:
Which mode has the poor reception - voice (crackly, call drops) or data (erratic, uneven speeds)? It is possible to change either modem in the switch, but you will have to experiment first.
[Galaxy Tab  Android Development] rangercaptain:
The sim card that came with the tab is broadband data pay as you go, and cannot do any voice calls at all, but you don't need to do anything to the tab to use it, you just pay the bill.

To have voice, besides installing the modem switch, you have to use a sim with voice and data.
[Galaxy Tab  Android Development] VitaZora:
But not a T-Mobile voice and data sim card. I found that out the hard way.
[Galaxy Tab  Android Development] jphilpot:
Rangercaptain,

I am using the modemswitch, but i just get redirected to tmobile site using my vibrant sim card.

so i would have to break the imei??

I guess it is pointless anyways.. don't want to pay for vibrant and the tab.. both under contract and my vibrant contract is up in 1 month also

it seems that using sip servers..etc... is flaky and doesn't work half the time.
[Galaxy Tab  Android Development] cgigate:
what complain here ?

change IMEI is piece of cake for this device.

I have been using data/voice for many months.
[Galaxy Tab  Android Development] rangercaptain:
You can do as this poster says very easily. Google "t-mobile redirect" for your solution.
[Galaxy Tab  Android Development] jphilpot:
thanks
[Galaxy Tab  Android Development] jerzy448:
thanks for all your work on this tab. because of your great work i can now receive and make calls. trying to add the switch now. once again thanx
[Galaxy Tab  Android Development] darkstar702:
Gingerbread 2.3.3 Euro ROM T-Mobile

I flashed the Android 2.3.3 ROM from TheGalaxyTab forums and used Roto's Modem switcher, and it has my Tab connecting 3G (Actually its showing the H, more consistent with 4G). The T-Mobile 3G speed is incredible!! Thanks again!!!
[Galaxy Tab  Android Development] rvnteck:
Will not work with Wind & Mobilicity on phone calls

I tried the modem switch and 2G modem, the switch works but its only good for data and text messages and it just goes to No Service when its on 2G modem.

So I confirm that unlocked Tmobile Galaxy Tab will not work with Wind and Mobilicity on phone calls!
[Galaxy Tab  Android Development] Bam-Bamm:
Read all 33 pages!!! Nothing Left but to THANK YOU!

I got hooked up with Simplemobile last night, walked out of there and realized, DANG IT, i can't make a phone call, I just paid this guy 85 to set me up with what I already had. Then I remembered, wait silly, you need the motoswitcher and you'll be ok.

At home, I'll switch it to the 2g, for phone calls all the time and use wifi, for internet.

On the road, I'm going to switch to 3g and use the GrooveIP app.

I use the tab right on the center of the dash. With the belkin silicone cover, I velcro it to the dash, and it's perfect, dead center and easily reachable for driver and passenger. makes for using mp3 and videos while driving(passenger only, riiiight) much more easily viewed.

MILLION TIMES OVER, THANKS ROTO

To others who've not read all the pages, take the time to do so, and you'll find the right fit for using this switch ability.
[Galaxy Tab  Android Development] galexandr:
Guys, maybe someone here can help me out, how do i unlock T-Mobile and/or ATT tab? which modem or anything like that do i use?

THank you much
[Galaxy Tab  Android Development] lettcco:
to unlock your tab, go to android market and download galaxy_s_unlock app. Follow the instruction there and you should be able to (network provider) unlock it.
[Galaxy Tab  Android Development] motohip:
I have att tab. Euro 2.3.3. Tmobile sim card. Will this give me 3g cause right now I'm stuck on edge.
[Galaxy Tab  Android Development] rangercaptain:
You will always be on EDGE. Your hardware isn't compatible.
[Galaxy Tab  Android Development] shyn2277:
Hi, roto everytime i follow the instruction all the Gscript keep saying is Stderr:finish and nothing else happens i've been trying to do this for the pass month with no sucess i know your the king please help, btw my tab is T-mobile italian version and gingerbread.
[Galaxy Tab  Android Development] rangercaptain:
Just reboot the tab with the power button. The script says you got the modem flashed.
[Galaxy Tab  Android Development] shyn2277:
galaxy tab

It keep saying redband_ua not found and othehelpr jebirish please
[Galaxy Tab  Android Development] rangercaptain:
You copied the folder and posted the folder into the folder you made, instead of copying just the files and putting them into the folder.
[Galaxy Tab  Android Development] rangercaptain:
Google "t-mobile redirect"
[Galaxy Tab  Android Development] kuribox:
PLEASE! Help!!!

When I switch to 2g modem I get calls but no data,runs to tmo site. When I switch to 3G modem,I get the 3g /H icons but get redirected to tmo site.

What am I doing wrong?

HELP!?!

Thanks in advance!

---------- Post added at 10:43 PM ---------- Previous post was at 10:42 PM ----------

same here, please Help!
[Galaxy Tab  Android Development] rangercaptain:
Hey, just read one post above.
[Galaxy Tab  Android Development] kuribox:
thanks! I fix it!
[Galaxy Tab  Android Development] sharaz191:
hi

I cannot switch to 3G

Switching to 3g only

stderr: failed to read from/

Sdcard/modemswitch/ROTO-3G_modem.bin (Bad File number )
[Galaxy Tab  Android Development] rangercaptain:
Check your work. I think you pasted the folder into the folder.
[Galaxy Tab  Android Development] Nix01104:
Modem Switcher

Thanks Rotohammer,Some of us refuse to trash our Tabs I just want to get the most out of it and I love it as a phone I dont care how it looks. I just dont know why US carriers insist on making our tech useless but they want us to pay them more every month and they give us less
[Galaxy Tab  Android Development] espionage724:
I didn't really do any reading or anything, but I just got a Prepaid SIM card from T-Mobile (for $2 comes with 10 minutes) and on my tab, I couldn't do incoming/outgoing calls.

I simply re-stocked and flashed the 2G modem from the modemswitcher.zip package, and now I can do both :)

I don't need/care/(probably shouldn't even do) 3G internet anyway, so I don't think I need to be switching modems currently :)

TLDR: If you only want calls/texts, flash the 2G modem and don't worry about switcher. If you only want 3G, then flash the 3G modem. If you want both calling/texting and 3G, you need modem switcher
[Galaxy Tab  Android Development] dnd02220:
HI

I have the GT, T-Mobile version ,rooted(GT-P1000) and running 2.3.3 stock firmware,p1000xxjpz baseband. I deleted the efs folder in root and now i have phone + EDGE data.Will this modem work for my device to get to 3g speeds or is there a different one i should use?

Thank you in advance.
[Galaxy Tab  Android Development] priyana:
like the post above you said:

If you only want calls/texts, flash the 2G modem and don't worry about switcher. (this is like what you already have, BTW)

If you only want 3G, then flash the 3G modem. (no phone call if you are using 3G modem)

If you want both calling/texting and 3G, you need modem switcher.

Edit: maybe you should replace ROTO-2G_modem.bin with your jpz modem just to make sure that when you switch back using the switcher you end up back to jpz.
[Galaxy Tab  Android Development] dnd02220:
Sorry , i should have asked differently. I am running GB,those modems are all Froyo.Can i use them or there are different ones for GB?
[Galaxy Tab  Android Development] priyana:
the dev section has a modem thread by darkpal.

Second sticky post from the top

I can't say if all modems are still around with the recent demise of megaupload, and seems like multiupload too.

I believe Froyo modem works fine in GB, but you can try it out. Not much harm to that.

I guess I should let T-mobile users answer your question about which GB modem is best to use for 3G.
[Galaxy Tab  Android Development] vuphuonganh:
I have never been able to make calls with T-Mobile modem, or with the 2G modem above. JPZ works fine to make calls though.

I don't have 3G so can't tell.

I have T-Mobile tab. Have used Overcome and ICS.
[Galaxy Tab  Android Development] cgigate:
i use my tab to call everyday on tmobile.

Post with T-Mobile Galaxy S II
[Galaxy Tab  Android Development] dnd02220:
With my T-Mobile Vibrant SIM card i am able to make calls, the sound volume is somewhat down,but not that much of a issue.EDGE is working fine too,i mainly use it for Navigation(no problems at all,fast rendition of maps even in satellite view), and e-mail & browser are not that bad either.It's not LTE speed,but prety close to 3G.So far so good,i'm not going to mess with it...till i get bored..
[Galaxy Tab  Android Development] rangercaptain:
When on a phone call click volume all the way up then down two clicks. You will have good volume.
[Galaxy Tab  Android Development] js4tda:
Was wondering can this still be done with HTC one S on an ICS ROM?

---------- Post added at 09:08 AM ---------- Previous post was at 09:06 AM ----------

AOKP SGT milestone 6 ROM is what I currently have flashed.
[Galaxy Tab  Android Development] priyana:
With regards to using this on ICS/JB be it AOKP/CM9/10

Yes it can be done,

I modified roto's work to work on MTD partition where the modem now just get copied to /radio/modem.bin

See my post in AOKP JB thread.

PM me if you need.

http://xdaforums.com/showthread.php?p=32512108

[ROM][JB 4.1.1][GSM/CDMA] AOKP SGT7 - JELLYBEAN (latest: 06/10/2012)

P.S. you still need the modemswitch.zip from roto.

I only posted one file that I modified.
[Galaxy Tab  Android Development] gophet:
Can someone confirm the current APN settings for tmobi le 2g voice services on the galaxy tab sgh-t849? Im trying to make a call but it gets stuck on "DIALING"
[Galaxy Tab  Android Development] priyana:
Calling doesn't require APN.
[Galaxy Tab  Android Development] japerez5000:
Greetings.

I have a question. I have to do if instead of the modem that comes with the file I want to use the JMA? It is that which brings the file can be heard very low sound. And try to replace it but had no success. Rotohamer illustrates my mind.

Thanks.
[Galaxy Tab  Android Development] rotohammer:
I think what you're asking for is the JMA modem instead of the Vibrant? I can do that. 1st post updated with JMA modem to replace vibrant modem.
[Galaxy Tab  Android Development] T33H00:
This is just great. Thank RoTo

so now I only need to download the Dialer Apk from market, is this right?
[Galaxy Tab  Android Development] rotohammer:
Did you read that somewhere? I flash the European firmware to get the dialer.
[Galaxy Tab  Android Development] Escaladez2:
Would it be possible to use the Vibrant's modem to achieve both 3G and voice?
[Galaxy Tab  Android Development] japerez5000:
Rotohamer're a genius. Thank you very much.
[Galaxy Tab  Android Development] ayman07:
No.
[Galaxy Tab  Android Development] foster21:
i keep getting a bad file name message what should i do.
[Galaxy Tab  Android Development] rsakuma:
Nice one, Roto.

Dunno what the heck I did, but first time using it hd the modem set to YYYYYYY.

second time it turned to 3g, and now I"m getting 3g and occasional H.

Sooo.....wewt.
[Galaxy Tab  Android Development] rotohammer:
The YYYYYYY is just the last 7 bytes of your currently installed modem file. The two modems I supplied have these bytes set to ROTO-2G and ROTO-3G respectively so I can easily determine where I'm coming from and where I'm going to.

All modems have YYYYYYY as their last 7 bytes (FF's in hexadecimal) as its just padding to fill out to the end of the 4096 byte block.
[Galaxy Tab  Android Development] calebchosen:
Hmmm I think I missed something...

I got JMC running on my tab. When I switch to 2g modem I get calls but no data,runs to tmo site. When I switch to 3G modem,I get the 3g /H icons but get redirected to tmo site.

What am I doing wrong?
[Galaxy Tab  Android Development] rotohammer:
What SIM and plan do you have? Usually redirection means you're using a SIM from a different phone, which T-Mobile blocks from working on the Tab.
[Galaxy Tab  Android Development] irkkso:
dialer.apk is already installed I able to receive calls but unable make
[Galaxy Tab  Android Development] calebchosen:
Sorry,that's the issue. G2 sim in there.

Have you seen how quick tmo

identifies the tab on the account? Practically in seconds.

I wish I could put an old mytouch imei on this.

Sorry for the waste of time.
[Galaxy Tab  Android Development] naddie:
Is there a way to make it switch between a TMobile modem and an AT&T one?
[Galaxy Tab  Android Development] Volker1:
Yeah, by reading this thread for example.
[Galaxy Tab  Android Development] naddie:
I did. Does not mention, hence my post.

I cannot simply replace the file because he uses something to check the last bytes for the strings ROTO-2G or ROTO-3G.
[Galaxy Tab  Android Development] rotohammer:
Sure, rename the at&t modem the same as the Roto modem you was to replace, then edit the last 7 bytes to match as well, assuming the files are the same size. Or, upload the modem you want to use and whether its for 2g or 3g and Ill edit it for you.
[Galaxy Tab  Android Development] naddie:
You are awesome! Thanks!

The modem I was interested in was the stock AT&T one that can be found on your ftp site. Unless you know of a better modem for AT&T.

I'm more interested in getting my tmo tab to play nice on tmo and at&t on 3g than using it as a phone.

Thanks again, roto! Also am loving your JME rom!
[Galaxy Tab  Android Development] rotohammer:
I put the modem on the first post for you. Let us know how it works.
[Galaxy Tab  Android Development] naddie:
Thanks again. The at&t modem (JK1) only got edge on my at&t sim. Signal was good, however. I made sure that I had wcdma and gsm on.

The same modem got 3g with my tmo sim. In other words, it acted the same as the stock tmo modem (JJB).

There is a small difference though. Tmo 3g was a good deal slower on JK1. Got 1.2mbps down, while JJB got 3.8mbps down. both reported good signal with the tmo and at&t sim cards.

And as expected, neither modems allowed phone calls.

I also messed with *#2263# to no avail. Strangely, both modems are set to 850/1900/2100. I expected the tmo sim to be set at 850/1700/2100.
[Galaxy Tab  Android Development] jnutz:
I have tried so many modems but I still havent found one that does 3G and voice on T-Mobile. I am sure it is just a modem and has nothing to do with the IMEI but the IMEI still needs to be disabled otherwise you will just get redirected to the T-Mobile accout page.
[Galaxy Tab  Android Development] felixm477:
i tried flashing and it looked like it was going well till i get to a part in the script where it says ROTO-2G_modem (bad file number) then it reboots and no changes are made. any suggestions?
[Galaxy Tab  Android Development] Adapt0r:
AT&T 3G on T-mobile Vibrant

To verify information that T-mobile Vibrant can do 3G on AT&T I tested it today with iPhone Sim card.

To my surprise it turned to 3G right away no tuning was necessary. In addition I set WCDA only mode and it stayed on 3G. I could place calls and get data.

The phone baseband version is T959UVJL4.

According to publications AT&T Galaxy phone does not get 3G on T-mobile.

Everyone can make their own conclusions but T-mobile rocks.
[Galaxy Tab  Android Development] rkthkr:
Would this work/what should I use on a Canadian Bell SGT?

Cheers, rkt
[Galaxy Tab  Android Development] adinis78:
Installed the switcher last night and works as stated, hopefully the glitchines when switching between modems is fixed or and app becomes available.

great work Roto.....
[Galaxy Tab  Android Development] irkkso:
T-mobile modem switch for European users 2G/3G/HSDA + voice +video calls!

ONLY FOR [ROM] Roto JME Pre-Rooted Firmware

!carefully follow ROTO's modemswitch installation instructions!

T-mobile modem switch for European users 2G/3G/HSDA + voice +video calls are working!!

1. download the T959uvjl5 modem http://rapidshare.com/#!download|963tl3|438478230|PDA_JL5modem.tar|12584

2. unzip into your /sdcard/modemswitch/

3. rename modem.bin in to ROTO-3G_modem.bin

4. switch modes from GScript Lite ! Enjoy.

A LOT OF THANKS TO ROTO MY T-MOBILE GALAXY TAB IS FULLY WORKING DEVICE NOW
[Galaxy Tab  Android Development] xpgroup:
Roto, after odin JME-v3 & CF-Root, modem switcher becomes not totally functioning. It will run the script & then go back to GScript Lite without rebooting. Even I press reboot under GScript Lite, the pad won't reboot until & manually press the Power button to turn off/on the pad. The modem does switch after that.... I tried to re-install your modem switcher & same problem exists. Please advise, thanks!
[Galaxy Tab  Android Development] b0ricuaguerrero:
im on roto v3. i tried the script but got this message. refer to screenshot below
[Galaxy Tab  Android Development] rangercaptain:
V4 has the same trouble - after correctly running the script - the tab won't reboot. I don't see any command to reboot at the end of the script, but I don't know codes or what a flashing utility is supposed to do at the end of a script.

I got Quick Boot from the market to reboot. That app reboots really fast.
[Galaxy Tab  Android Development] msgfromside3:
I don't have the problem with V4. I did full flash for V3 and ran switcher to get 3g on tmo. For V4 I just did upgrade. Just switched back and forth without an issue.

Edit: btw, booting got faster after switching. It took a degree of minutes and now a degree of second. I wish xda App has thank you button. :)
[Galaxy Tab  Android Development] raaleck:
I dont know if you fix this, but I just backup my EFS folder (where is the IMEI) and then reboot the Tab so Tmo cant recognize my Tab.
[Galaxy Tab  Android Development] rangercaptain:
Did you reinstall busy box from the market after you upgraded? Or was your setup left alone when you ran the upgrade?
[Galaxy Tab  Android Development] msgfromside3:
With V3, I didn't touch anything. With V4 I installed one from titanium backup then market later when I tried to replace the one that roto installed.

Btw, I like roto's version now.
[Galaxy Tab  Android Development] adinis78:
i am sure i already mentioned this, but is there an update on a Modem Switch APP? It would be more convenient than the current method.
[Galaxy Tab  Android Development] rangercaptain:
The vibrant is a quad band phone - it has the two bands t-mobile uses, and the two for at &t. Tabs have only the two bands required for the carrier named on the tab.
[Galaxy Tab  Android Development] hkwong:
question

roto or anyone else, does this mean that i can put my att 3g sim in a tmobile tab and use 3g speed with att or voice and 2g (edge).

thanks
[Galaxy Tab  Android Development] rangercaptain:
An at&t sim in an unlocked T-mo tab can obtain voice and EDGE data. No 3G. The same result if you put a t-mo sim in an unlocked at&t tab. They can't use the other's high speed data frequencies.
[Galaxy Tab  Android Development] Laap:
Want to try new modem from GT SC-01C DoCoMo Japan

I have GT T-Mo flashed with Roto's firmware and was wondering if anyone can tell how/where to get the modem.bin for GT SC-01C DoCoMo from Japan, in order to test it if both Dialer and 3G would work simultaneously with Windmobile Canada...
[Galaxy Tab  Android Development] rotohammer:
I believe Wind uses AWS, so chances are a Japan Tab will not work on 3G. Even AWS capable Tab's can't do voice and 3G data at the moment.
[Galaxy Tab  Android Development] rangercaptain:
Roto, I am interested in your suggestion of making your modem switcher script into an app. How would I go about that? Where were you going with that, if you could point me in the right direction. I want the opportunity to contribute to your impressive work..
[Galaxy Tab  Android Development] Laap:
Windmobile Canada

You're right Windmobile is AWS, some how I couldn't load your scritp but tested both modems separetely and with the 3G modem I get very good reception and 3G and H speeds for data but no phone, with the 2G modem I can only make phone calls with other sim card like fido. Any suggestions? I'd appreciate your expertise... You're The Man..
[Galaxy Tab  Android Development] rotohammer:
You're in the same boat i'm in. Theres no solution to this at the momentI
[Galaxy Tab  Android Development] rangercaptain:
Roto and All:

I set up an At&t tab for a a friend in Mexico to run on Telcel, using all the techniques in these tab forums. It was sweet to see the tab have voice, 3G data, and video chat with Roto-JME and the bell 1900 modem, without the destroyed serial number and IEMI code, and no modem switcher. Us T-mo people should have it that easy by now!

On the vibrant forum is a list of ten modems. Can a vibrant modem.bin flash into a Tab?

What about the T-mo My Touch 4G modems? The phone does video calls.

Can either of these series of modem firmwares help us?

I will be a flashing, apn changing fool today if you can confirm.
[Galaxy Tab  Android Development] adinis78:
Roto i seem to have an issue with the modem switch, everytime i run it i get the following message:

and the phone does not reboot to make the change, the only way to make the change is to physically reboot the phone.

I have reinstalled Busybox, and re-setup the shortcut and still the same issue. Any ideas?

I am running your JME v4 firmware.
[Galaxy Tab  Android Development] rotohammer:
That looks serious! ;)
[Galaxy Tab  Android Development] adinis78:
lol, i edited the post...
[Galaxy Tab  Android Development] rotohammer:
Yes, you can flash vibrant modems. The ones I've tried work but no 3g. There may be one out there though. You can pretty much flash any modem, and if the phone doesn't like it, you'll just get no signal because it wont actually load. Its a safe way to have fun.
[Galaxy Tab  Android Development] rotohammer:
My guess is that you're running cf-root. Try changing the last line of the script to

reboot normal

That should fix it untill you install the fixed cf-root.
[Galaxy Tab  Android Development] adinis78:
i havent installed cf-root....any other sugestions?
[Galaxy Tab  Android Development] adinis78:
and what does the line look like exactly so i know what to change?
[Galaxy Tab  Android Development] swordsaint_ss:
Can someone please confirm this. When you switch modems to the stock 3G one you no longer receive calls but your TEXT messaging and DATA service are left intact? the reason why i'm asking is i'm trying to figure out a way to have notifcations of when a call comes in such as Tmobile Visual Voicemail.

That way I can switch to the 3G modem all day and only switch to the phone +2g one when i actually need to make a call or receive one. I need to know if it supports text messaging though. My guess is that it does as the actual Mobile Broadband Plan for the galaxy tab includes unlimited text messaging. Thank you for anyone confirming or giving their actual experience and setup.