Can I flash a different radio?
Seen your graph with SignalCheck, it looks like you have more radio signal strength than the signal bars are showing.
I think you don't have to worry about unless the connection drops out totally. Sometimes I get the same readings in my Sense edition.
Anyway, if you want to try, here is a compilation of different radio firmwares, including two for T-Mobile:
http://xdaforums.com/showthread.php?t=2736921
If you decided to flash a new radio, first connect your device to your computer and do a backup of your current radio firmware with the following procedure:
Open a command prompt in your computer where your ADB & Fastboot commands are located and type the next commands (press enter after every one).
- Type:
adb shell
- Type:
su
(Check your device screen if your root program (SuperSU or Superuser) asks to grant root permission, and allow it.)
- Type:
dd if=/dev/block/mmcblk0p20 of=/sdcard/radio.img
- Type:
exit
- Type:
exit
- Type:
adb pull /sdcard/radio.img
Now you have in your ADB folder a backup of your current radio firmware, follow the procedures to flash a new radio firmware and if something goes wrong, just flash the one you backed up.
Cheers!