Fix for 3g issues with T-mobile

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Guide for 3g lock fix.

Phone needs to be rooted

go into terminal, su (You can download a terminal from the market)
mount -o rw,remount /dev/block/mtdblock3 /system
vi /system/build.prop
goto the end of the file
hit a (for append)
Add the two lines to the file
press escape (Ball + 1 depending on terminal client)
type :wq! ( : won't show up)
cat /system/build.prop to make sure your lines are in there and look correct.
save, exit, and reboot (reboot twice).

TMO US:
ro.ril.hsxpa=1
ro.ril.gprsclass=10

TMO EU:
ro.ril.hsxpa=2
ro.ril.gprsclass=12

You can check to see if the changes took by going to your phone status and seeing if your version changed. It should be 32.19.00.16u (or whatever version you are on) on settings 2 and 12 32.19.00.16h (or whatever version you are on) on settings 1 and 10 (this one clears things up for T-mo US)

Info on settings
ro.ril.hsxpa=0 - UMTS r99
ro.ril.hsxpa=1 - HSDPA
ro.ril.hsxpa=2 - HSDPA/HSUPA

GPRS Class----Max. data transfer speed
Class 2--------8 - 12 kbps upload / 16 - 24 kbps download
Class 4--------8 - 12 kbps upload / 24 - 36 kbps download
Class 6--------24 - 36 kbps upload / 24 - 36 kbps download
Class 8--------8 - 12 kbps upload / 32 - 40 kbps download
Class 10-------16 - 24 kbps upload / 32 - 48 kbps download
Class 12-------32 - 48 kbps upload / 32 - 48 kbps download

Thanks to wagz & stimpoff for the info and help.

I wouldn't call this a fix, but a workaround. You are screwed if you go to an area that doesn't have 3G like you said.

Originally Posted by staulkor

I wouldn't call this a fix, but a workaround. You are screwed if you go to an area that doesn't have 3G like you said.

You are right its not a real fix. Renamed thread.

Originally Posted by shep211

1 Download Any Cut from app store
2 Create short cut for "Phone Info" with Any Cut
3 Open Phone info shortcut
4 Change WCDMA preferred to WCDMA only

Tip: If you dont have 3g coverage change back to WCDMA preferred or edge wont work.

an easier way is to dial *#*#4636#*#* and set preferred network type to WCDMA only. wait for it to get signal again and your good to go.

Yea I did the anycut way...works fine...cause its annoying going from 3g to edge right in the middle of a download.

If you can get the widget to toggle "Use only 2G networks" you can bypass having to use the code again to change it back to preferred. it will default to 2g and when you know your back into a 3G area, uncheck the 2g only and it will stick with 3G only again.

Agreed, this is not a QUICK fix... *#*#4636#*#* is much faster, and if you press down the HOME softkey you will be able to re-enter the testing menu again and change/edit settings.

WCDMA only mode doesn't even work in my area with -63 dBm and 25 asu!!!


Not sure who to blame but this is annoying already. I don't think it's the phone I really believe it is politics and Jealous T-Mobile and their crappy phones.

Originally Posted by bk420

Agreed, this is not a QUICK fix... *#*#4636#*#* is much faster, and if you press down the HOME softkey you will be able to re-enter the testing menu again and change/edit settings.

WCDMA only mode doesn't even work in my area with -63 dBm and 25 asu!!!


Not sure who to blame but this is annoying already. I don't think it's the phone I really believe it is politics and Jealous T-Mobile and their crappy phones.

Its ease for me to click icon, cwcdma option and then home. Typing *#*#4636#*#* takes longer then 3 screen taps.

Originally Posted by shep211

1 Download Any Cut from app store
2 Create short cut for "Phone Info" with Any Cut
3 Open Phone info shortcut
4 Change WCDMA preferred to WCDMA only

Tip: If you dont have 3g coverage change back to WCDMA preferred or edge wont work.

What is the "3G issue"?

I'd like too know also.....i saw Cyan mention something about it but i have no clue what happened/going on

Edit:

Mikey: whats the deal with this 3G "issue"
Enomther: flaw in the framework
that's what I've seen ... I'm expected an update from google for it
of course tmo won't say that ... and neither will google ... but I'm almost positive
Mikey: ok, what is the flaw causing
Enomther: I'm on constant edge right now ... to combat it
it's causing an "overchecking" from what I can tell
in the network state
Mikey: ohhh