yashsingh1/xdaforums huggingface dataset:
[HTC Inspire 4G] brad_wp:
Ok, sorry for the delay all, I've been completely swamped at work, and I just moved into a place with horrible coverage, so it's been tough to do thorough testing. I think this is the best I can come up with.

Where I live AT&T only broadcasts the 850 MHz band, so that's all I've been able to futz with.

This first design has given me the best 3G/HSPDA results. Now I caveat this by saying it only gives a MARGINAL improvement over the stock antenna. I forgot to take pics of the measurements before I applied the antenna, but these are shots of the backing.

Cut a strip approximately 40mm long.

Cut a notch 5mm wide about 2mm in from the left edge, to halfway up the strip.

This gives a height of about 6.2mm,

and a length past the notch of about 38mm for a total antenna length of 44.3mm (give or take). This is pretty close to 1/8 the wavelength (44.11765) at 850 MHz.

Where I did my testing I got a fairly steady -99dBm signal over 3G/HSDPA (WCDMA), and -95dBm over EDGE (2.5G/GSM). With the above antenna design I was getting -97dBm 3G/HSDPA, and a significant increase in EDGE to -87dBm. To get these readings I entered the Field Test Mode by inputting *#*#4636#*#*

Now, I must say before I started testing I had much higher hopes for this next antenna design, but after testing I think that with it doubling back it must have been cancelling out some of the signal. I'm not going to go into as much detail on the dimensions. The ruler shots should give you enough to go on if you want to try it.

As I said this design was disappointing to me I though it would work very well. For some bizarre reason it worked much better for an EDGE signal boosted reception to -85dBm, but was rubbish for 3G/HSDPA; the best I saw was -101dBm, but it was steady between -103 and -105, so much worse than the stock antenna.

---------- Post added at 02:29 PM ---------- Previous post was at 01:50 PM ----------

Here's the antenna installed. The notch allows you to clear the 1900MHz antenna connector.

Overall results for me were disappointing. Without precise measurements and an oscilloscope to do more extensive testing (with a lot more trial an error) I think your best bet would be to get one of AT&T's 3G microcells.

Sent from my Desire HD
[HTC Inspire 4G] aybarrap1:
Marginal improvement is a start. Perhaps if you were not stuck on 850MHz you would have seen better results. Too bad you did not get a screenshot of the first go. This definitely points that modding can go either way and definitely supports the theory regarding wavelengths. Thank for your input. I will try to duplicate several of the methods (and sizes of mods) that have seemed to work by next week and see if I can get anything showing positive improvement.
[HTC Inspire 4G] 39FarmallM:
@brad_wp does it matter whether you hold the phone vertically or horizontally according to your testing?

Sent to a tower near you using ClearDroid and XDA Premium. :)
[HTC Inspire 4G] brad_wp:
For the stock antenna (for the 850MHz band at least) it doesn't matter a whole lot because the L shape leg lengths are closer.

For the longer modified antenna orientation matters. The best results were with the phone vertical. It doesn't make a lot of sense to me, because cellphone signals are vertically polarized. With my modded antenna holding the phone vertically orients the antenna horizontally, so having the phone horizontal (antenna vertical) should have given better results.

Sent from my Nexus 7
[HTC Inspire 4G] EyesofThunder:
I have done some antenna work, and I have the test chamber to measure the antenna efficiency where I work (which is something I do lots of). I am NOT an antenna engineer, just a RF tech with access to an antenna chamber to test with. I have made some great antenna for LTE, but as soon as they get in the phone they are crap. LTE in the 700 band is a tough band to design for. High Band (1700-2170) is easy.... But the RF does come off the phone at much different angles than low band in most cases.

Without a network analyzer it is hard to see what is happening to the TX lineup, you could be putting in a LOT of mismatch, and also are almost for sure, negatively affecting SAR. So be careful there.

Things I have learned on antenna design:

General rules:

1. Thinner traces have the effect of seeming longer to the PA. But thinner reduces radiation efficiency.

2. Fatter traces are more efficient radiators.

3. Stay AWAY from metal (in the phone)

4. Stay AWAY from cameras and speakers! They wreck the best of antennas. Like sticking a stick in your carburetor barrel.

5. Don't get your hand near the antenna. So when you are doing "game mode" aka, hand holding while using the phone, do NOT get your hand anywhere NEAR the antenna, it wrecks it.

6. Antennas are often used on multiple bands, so you might help one and wreck another. We don't care here in the US for GSM900 and GSM 1800 (DCS) and we don't care for WCDMA 2100 "band 1". So you can comprimise those without ill effects.

7. Improving antennas might easily compromise SAR and subject you to more dangerous RF levels.

8. Covering antenna with plastic (aka, battery door) usually moves resonance of the antenna DOWN 20-30 MHz. So it effectively lengthened it a little bit.

9. A 50 ohm load is perfect to the PA, but yet radiates nothing. Most every antenna I have done shows best radiation efficiency NOT near 50 ohms.
[HTC Inspire 4G] rorreo:
I am trying this with aluminum foil how thick are you guys making the foil
[HTC Inspire 4G] Duffmantp:
Just a single sheet. If you make it to thick when you slide on the cover it will mash up and wont work.
[HTC Inspire 4G] rorreo:
i am testing it i tried both ways the two pieces / now the one long strip.... the long strip one piece i cut to fit the two L shaped indent nthe black plastic on the cover itself
[HTC Inspire 4G] Duffmantp:
if you cut the copper stripes like i did to equal lengths would that have the same effect on the antenna wavelength. I did try one longer then the other and I did have a problem with signal. But when i made the extensions equal length, theoretically, all i did was extend the current wave equal to the original wavelength by adding the copper stripes. So as long as you make the copper stripes the same length, then the wavelengths should be the same whether is the unmoded or moded versions.
[HTC Inspire 4G] t12121:
Going to try this mod as soon as I get some copper tape.
[HTC Inspire 4G] t12121:
did the antenna mod

I did the antenna mod using about a 1/4 inch x 1/4 inch piece of copper tape on each end. It seemed to give a moderate increase in signal strength. I would say I get maybe one extra bar on the top. It worked for me.
[HTC Inspire 4G] graydiggy:
Hey guys. I am back,,, But only to post this and something else...

About a month ago, I was robbed and my phone was stolen along with my room mates phone. We both had the inspires.

Unfortunately we could not report them stolen to AT&T because we were both running custom ROMs and were both using GoPhone sim cards.

All this happened very shortly after I did some pretty awesome hardware mods to the device like actually using copper tape instead of aluminum foil for the antenna and a GPS mod that really kicked ass.

So if anyone has any questions about them, please PM me. I have a few spare parts laying around. PM me about those as well.
[HTC Inspire 4G] gage0727:
any new info going on with this. i have some copper tape coming and plan on trying it for the heck of it.
[HTC Inspire 4G] gage0727:
well tried different designs of the tape, finally did the two square pieces and got two bars better signal.
[HTC Inspire 4G] graydiggy:
Congrats! It seems to be the best way to get it right.
[HTC Inspire 4G] gage0727:
i am having isses of a reall bad echo on the other end of my phone calls. I do not hear it but the person im talking too dose. I had to cut back some of the copper tape and that seam to lessin the volume. But still their, any one else have the same issue.
[HTC Inspire 4G] graydiggy:
I never had this issue. Can you give me more details?

ROM?

RADIO?

How much copper tape did you use?
[HTC Inspire 4G] gage0727:
preity much all i can say is the person on the other end hears their voice echoed on their phone. only happens when on a call with my phone, and the phone i tried it on, my wifes is not rooted.
[HTC Inspire 4G] graydiggy:
I'm talking about your phone. Does this happen in all signal areas or areas that would have a lower signal? What are you using on your phone specifically?
[HTC Inspire 4G] gage0727:
sorry do not understand what your asking boss. You asking about the antenna mod or the rom i am using. You asking about the issue i am having with the echo. As far as rom's just about every one on the first page of developers forums i have tried. Trying to narrow the issue, have also tried couple of the latest radio's as well for inspire.
[HTC Inspire 4G] graydiggy:
Did you try removing the copper to see if it still does it?
[HTC Inspire 4G] gage0727:
yes and it did low the volume i guess you could say, wife said it was not so noticeable but still their.

---------- Post added at 11:03 PM ---------- Previous post was at 11:02 PM ----------

Just sucks though because with this mod if it turns out to be the prob. it did give me better signal. i had signal in places I didnt have it before. maybe i just have too long of copper strips.
[HTC Inspire 4G] graydiggy:
It it still does it without the copper, be it less noticeable or with the same ecgo, it isn't the coppers fault. It may just be your area...

All you need is about half an inch long by a quarter inch wide total before you place them on the antenna contacts.
[HTC Inspire 4G] skylinegtrvspec:
well im going to give this a shot just for fun
[HTC Inspire 4G] EyesofThunder:
I traded some work for a Inspire 4G, when the chamber isn't busy I will do some antenna work on this one and see what I can come up with that works better.

If we concentrate on certain bands, say US only, you can do better, but if you need more bands, say if you travel and use other bands and need performance there, it will be harder to match it.

If anyone has a dead phone that I can have, I can put a coax in and do more work on it as I get time....
[Sprint Samsung Galaxy S III] sykosykes:
I am coming from the original HTC Evo, which was extremely prone to scratching on the camera, due to the protrusion of the camera. I have since upgraded to the S3 and notice the camera also protrudes out a bit, although not quite as prominently. Has anybody notices any scratching on their S3 camera from daily use (phone in pocket, sitting on counter tops, etc)?
[Sprint Samsung Galaxy S III] jamcar:
I got my sIII two days after release and I don't have a single scratch anywhere.
[Sprint Samsung Galaxy S III] DrgnRebrn:
Had mine 2 more nths now, not a scratch anywhere; although I bought a case at the same time as my phone in order to prevent that from happening. These phones are expensive! I wanted to protect my $200 investment right away!
[Sprint Samsung Galaxy S III] m20120:
I had the same problem with my Evo 4G. The lens cover was all scratched after a time.

As soon and I got the GSIII I bought a case (Seidio Surface) to protect the phone. It has the camera recessed to protect it. If the two days that I had the SGIII without a case I was careful not to scratch it. A problem I noticed right away was that the photos would be streaky in high contrast situations. The problem went away if I cleaned the camera with a lens cleaner. The problem was a fingerprint streaks from simply using the phone. The case also helps prevent this since you no longer can directly tough the lens buy just talking on the phone.
[Transformer TF300T Q&A, Help & Troubleshooting] bob_harris:
I have one of the custom ICS roms installed on my TF300T and want to install the offical JB release.

I downloaded the WW version from here: http://www.asus.com/Tablet/Transformer_Pad/ASUS_Transformer_Pad_TF300T/#download

What then? I read somewhere you put it on an SD Card then reboot and it should detect it? Does it have to be an SD card? I put in onto the root of the internal memory but nothing happens if I reboot. Do I need to rename it, update.zip or something?

I doubt I should use the recovery to flash it, or is it as simple as that?
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Hi,

I have a Motorola atrix 4g. The phone will not boot up. It turns on and the Motorola logo come then the red light stars blinking. after a minute or so the phone restarts and repeats the process. I tryed factory hard reset but no luck.

i fount this on the web http://xdaforums.com/showthread.php?t=966405 but has no idea how to do this.

Pleas help me

thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] Jack Krauser:
It happens if there is somthing wrong when you install a rom

try to find another rom and flash it if you unlocked the bootloader

or flash ATT 4.5.91 Rom via RSD Lite ONLY IF YOU HAVE LOCKED BOOTLOADER
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
hi,

thank you for the fast replay. I have rsd installed, but where can i find this rom
[Atrix 4G Q&A, Help & Troubleshooting] stevendeb25:
Softbrick

Is bootloader unlocked? Says on m logo?
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
It is not unlocked. There is nothing on the logo. Only the m
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
help

help please
[Atrix 4G Q&A, Help & Troubleshooting] android-DEP:
go here to download any atrix related files

visit that site, it contains everything for the atrix and the best place to get roms, tools, utilities, mods, tweaks, and so forth....

but first download the zip file below this message. I uploaded the zip file for you that has adb, fastboot & moto-fastboot(lets you install .img over 100mb), the necessary dll files & atrix recovery image & command.bat which just opens the command prompt window for you and puts you into the folder so you dont have to navigate anywhere in command prompt to located folders.

first try this, download the zip file, extract to any folder like c:\fastboot

then run the command.bat file to quickly bring up a command prompt and type these commands

fastboot -w
fastboot flash recovery recovery.img
fastboot reboot

that may solve your issue if your kernel installed properly and the boot.img file was properly written to the boot partition. If it doesn't solve your problem, go to that link above to find the kernel for whatever rom you're on, att, cm7 or cm9. Get the correct kernel thats compatible, pull out the boot.img from that zip file and also place it into your fastboot folder, then go to fastboot mode again and type "fastboot flash boot boot.img" and then fastboot reboot.
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Hi,

I tryed doing this, but i get a error " Failed to process command flash: recovery error (0x180002)

I think when i tried to flash rom with RSD LIght may have done something to the files. and it was no help. I dont get a flashing red light now. only the phone stops booting at M logo.

Now How do i flash new rome ? Do i use RSD Light or something else. I know that RSB Requires .sbf file but all the files i see in the site you gave me are .zip.

i also tryed the fastboot flash boot boot.img and no luck, it gvies me the error "Failed to process command flash: recovery error (0x180002)"

thank you for the replay

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] android-DEP:
do you have clockworkmod recovery installed or any custom recovery installed? if not, then thats why it wont flash, your bootloader is locked.

the whole idea behind using clockworkmod recovery is to avoid using RSD to flash sbf files which can brick the phone easily. Its best to avoid using RSD to flash sbf files on your phone at all costs and leave only as a last resort method if you just cannot recover the phone.

Flashing a new rom would normally be done by already having your phone rooted and unlocked with clockworkmod recovery or some other custom recovery installed so you can boot into recovery and choose "install from zip" and point to the zip file that has the rom. The custom recovery does the flashing for you and its a safer method of flashing roms on the phone than RSD.

If you got no other choice and I know what thats like, i been there too. Download RSD Lite v5.6, should be a free download online somewhere, and then search online for "1FF-olympus-user-2.3.6-4.5.141-111212-release-keys-signed-ATT-US-GAS_NA_OLPSGBATTSPE_P012.sbf", then use RSD to flash that sbf onto phone.

Before trying that, goto http://samcripp.com/files/ and in the folder OTA Updates, download the first file named Blur_Version_91.4.5.141.MB860.ATT.en.US.zip and put it into the fastboot folder, boot into fastboot again and try "fastboot update Blur_Version_91.4.5.141.MB860.ATT.en.US.zip" and you may be able to get away with just using fastboot to flash that update onto the phone to restore corrupt files. I would try this before using RSD to flash the phone
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Well i tryed everything you provided, but no luck. I tryed the RSD but it dont go past the M logo after flash. any other way you know?

thnak you

pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] android-DEP:
http://xdaforums.com/showthread.php?t=1163342

you said that site doesnt have any SBF files to download, this is a good example of why the owner decided against posting the sbf files online. A lot of people from what I heard, were either soft bricking their phones into temporary hat weights or going full out hard into brick city on a one way ticket joy ride. Flashing sbf files is very risky and RSD tool isn't really meant for the public to be downloading to use at home and flash full roms over their devices. Thats a Motorola utility and it's not exactly a risk-free method of flashing the rom inside these phones. Plus getting SBF files online, you rarely know 100% if its compatible with your model phone or where came from exactly and that it's integrity can be checked for 100% consistency that nothing half-way through the file is missing any chunks of code or is corrupt. Try sticking to only using fastboot & adb & get clockworkmod recovery to make FULL and complete devices backups.

Now that I learned my lesson a few times, no matter what, first thing I always do in recovery is make a backup before I flash anything at all, just in case of just in case, its better to measure twice and cut once.

try that link above and restore stock gingerbread 2.3.4, phone doesnt need to be unlocked or root, and make sure to use "moto-fastboot.exe" it lets you push\pull & install files larger than 200MB onto phone through fastboot, the regular fastboot has some limit on file sizes
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Hi,

to give you a update noting worked. The link you provided dont have any working lnks to download. I tryed some other once and no luck. It gave me "failed to boot 1". so i flashed this file "1FF-olympus-user-2.3.6-4.5.141-111212-release-keys-signed-ATT-US-GAS_NA_OLPSGBATTSPE_P012.sbf" it went away, but no boot after the logo. I don't know what i am doing wrong. Any other ideas?

Thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
when rds end flashing the sbf the phone gets a bootlop or failed to boot error again?
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
it starts up, the M logo comes and it freezes there. To turn the phone off i have to pull the battery.

thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] sikkijazz:
Restore Your Motorola Atrix 4G Back to 4.5.91 Stock Firmware

it helps to remove any problem related to rom..

With so many Android phones literally flooding the market these days, it’s no wonder that there are also so many firmware upgrades and custom firmware being developed and released every now and then. A superior device with great stuff neatly packed into it, the Motorola Atrix 4G is one of the devices for whom developers have devoted significant firmware love.

One reason for the attention that devs give to the Atrix 4G is that it is a fantastic device with a dual-core Nvidia Tegra 2 processor and robust ability for handling impressive graphics and video without choking. Together with its powerful processor and 1 GB of RAM, the Atrix 4G is a mean powerhouse that can be further exploited with the use of third-party applications and custom ROMs.

In an age where technology is constantly changing at an alarming pace it is important to always have a trusted source to get your updates in a timely fashion. Custom ROMs and factory firmware updates have played a crucial role in the development in many of our devices.

For those of you who have rooted your Atrix 4G and already have installed custom ROMs, then you might already have some bad experiences with regards to unofficial firmware sources. Unofficial firmware such as custom ROMs are literally filled with many bugs and disabled features. In many cases, these ROMs are not stable for daily use.

Luckily for owners of the Motorola Atrix 4G, there’s an escape hatch for reverting to stock, functioning firmware and return the phone to its factory state.

In this tutorial, you will learn how to roll back your Motorola Atrix 4G to the official firmware version 4.5.91, regardless of your current firmware

HERE IS THE LINK FOR YOUR PROBLEM....BEST OF LUCK
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
then you can now try unlocking and flashing cwm recovery and flash a custom rom to avoid using rds again
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Hi,

doing this gave me SVF:108:1:2

fail to boot 3

starting rsd mode
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
So how do i go about doing this? is there a link i can use?

thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
help please
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
I am able to get into android recovery. It has a option to update from sdcard. Can i do something with this?

Pleas help

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] ravilov:
If you mean the stock recovery, no.

Like you've been told already, you need to unlock the bootloader, then install a custom recovery, and then install a ROM (custom or stock, whatever).
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
Hi,

can you or someone point me to a guide that can help be do this, please

thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
if you can enter to rds and fastboot mode proced.

1- fist you need to aply de unlock sbf trough rds lite.

Dwonload unlock sbf here

2.-when finish you need to run the script i give you this version i cant found the original

Download raiden script here

the scrpt need ti be extracted C:\ to work go to atrix carpet and run atrix_mod_raiden.bat

3.-choose 1 press enter then 2 and enter again. put youre phone in fasboot mode and wait

4.-when it finish reboot youre phone and check that unlocked word are in the top left corner of the screen if it appear congrats just one last step.

5.-put youre phone in fasboot again run the script an chose 2 and now chose any number from 1 to 6 and enter when you finish you have cwm recovery installed nad can flash any custom rom.

sorry im not good doing tutorials but i hope it helps you.

cheers.
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
so when i try to flash the unlock. sbf i get this ( sec_exception: febe, 35, 35) An RSD says failed.

and when i run the "atrix_mod_raiden.bat" it says "(bootloader) OEM unlock is not implemented)

please help

Thank you

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
the second fail because you dont have the bootloader unlocked

youre phone its from at&t?
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
yes
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
then try flashing this unlock.sbf.
[Atrix 4G Q&A, Help & Troubleshooting] kinggeorge3287:
No it didnt work.

SVF:105:1:2

Fail to boot 0x1000

RSD says

"Failed flashing process. failed flassing process. phone (0000): Error switching phone to BP Pass through mode ( (0x70BE); Phone Connected"

thank you for the fast replay. any other thoughts?

Pgeorge
[Atrix 4G Q&A, Help & Troubleshooting] lucamibel:
youre phone says no os detected?