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MyTouch 3G Unable to Access 3G Network

So I stumbled upon something interesting the other day while running a CSDI ROM. I noticed I was unable to use 3G data anymore even if I had full reception and my menu bar indicated a 3G signal was present. Funny thing is I can connect and use 2G just fine.
Since then I've tried wiping, flashing other roms, upgrading recovery, reformatting and partitioning my SD card but to no avail. I don't believe it to be a problem with T-Mobile's 3G network either (I've since called them an am awaiting any further help they could be).
I've made sure "T-Mobile" was selected under "Network operators" but that didn't seem to help. I know I can "use only 2G networks" but that would just be silly to not try and get my 3G up and running again.
Is anyone able to shed some light or have any input into this situation?
Current ROM: superD 1.11
HBOOT-1.33.0006
RADIO-2.22.23.02
8 GB Class 6 SD card
Thanks,
jephyb

Try *#*#4636#*#* ,and then you can see information phone,there select "wcdma only".I have the same problem like you,the reason is that signal 3G no strenth enourgh and phone always change net between 2G and 3G.

I had no data for 3 or so hours, searched google's live twitter feed and others list data as well.
Sent from my T-Mobile myTouch 3G using the XDA mobile application powered by Tapatalk

nc.xliang said:
Try *#*#4636#*#* ,and then you can see information phone,there select "wcdma only".I have the same problem like you,the reason is that signal 3G no strenth enourgh and phone always change net between 2G and 3G.
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Thanks for your help, however after switching that setting, it worked for a little bit, then the data connection stopped functioning again. Even though it shows "3G" at the top with 3-4 bars, I simply keep losing the data connection whenever I access the internet.
This is very annoying...

Prevent 3G data connection

Hi All,
How do I make it so that my phone will not try and connect to the internet via 3G (the signal icon on the status bar has 3G written on it). Whenever my phone switches to 3G, internet doesnt work. this has been a problem for me here in Aus on multiple phones. While the icon says H, internet works awesome but the second it switches to 3G internet stops working until it switches back to H. It wouldnt be too bad, if it wasnt for the fact that the bloody thing switches back and forth every 5 seconds if Im in a good reception area, which is almost all the time.

Are you rooted/custom ROM? It sounds like it could be a poorly performing radio. Search for the radio/ril thread. You might find some answers there. You can switch your phone to 2G or 3G networks only, but the 3G option also includes H. So even if you left out the 2G you'd still suffer the same issues.

Signal Changing 3G H H+

Hi, I have the Wifi + 3G version of the Galaxy Tab 2 10.1 P5110 and experiencing problems with the signal changing.
I connect to a website called Salesforce and whenever I input data my connection drops, I have noticed at the top the signal is constantly changing between 3G, H and H+ every 3 seconds. When connecting to this website through Wifi I have no problem.
I have changed options to just use 3G only but this still switches between the 3 network variances.
I have tried putting another web browser onto the tab and this had no effect.
I have double checked and triple checked the APN settings, deleted APNs, created new APNs and no luck.
I have also contacted my mobile data provider to see if they and just give me 3g access and no H or H+ but thats impossible on there side of things.
I currently have samsung stock 4.0.4 android software installed on the tablet.
Any ideas on what I can do to resolve this issue with the signal switching all the time?

This happened with me when i was in a place with bad coverage or inside a building. It cant maintain a stable connection so it switches to another.
When i got out of the building or moved to a place with better coverage the connection became stable at H+.
Hope this helps.
Also, if your tab is not locked to a provider try another provider.

[Q] Signal problems

I am running on [4.4.2] [FEB-13][UNOFFICIAL] AOSB Project [v1.2.9] with a I535VRUCML1 modem. my signal was giving me 1x so i went into the options and changed the prefered network type to LTE/CDMA/EvDo and allowed data roaming.and now it i toggle airplane mode i can get one bar of 4g but then it switches down to one bar of 3g and eventually down to 1x. I originally had the VRBMF1 modem with the same results. Also it might be worth mentioning that when i select LTE/CDMA/EvDo it apears as network mode: CDMA+LTE/EvDo. Any ideas on what i might be doing wrong, or how to fix it?

aarrison126 said:
I am running on [4.4.2] [FEB-13][UNOFFICIAL] AOSB Project [v1.2.9] with a I535VRUCML1 modem. my signal was giving me 1x so i went into the options and changed the prefered network type to LTE/CDMA/EvDo and allowed data roaming.and now it i toggle airplane mode i can get one bar of 4g but then it switches down to one bar of 3g and eventually down to 1x. I originally had the VRBMF1 modem with the same results. Also it might be worth mentioning that when i select LTE/CDMA/EvDo it apears as network mode: CDMA+LTE/EvDo. Any ideas on what i might be doing wrong, or how to fix it?
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I won't trust the signal bar, specially on custom rom. You should download an app called SignalChecke light and see the reading in db. Around -102db is OK.

buhohitr said:
I won't trust the signal bar, specially on custom rom. You should download an app called SignalChecke light and see the reading in db. Around -102db is OK.
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Its not the signal bar. I get the same Same signal strength as before about -98db of 4g. But the signal switches automatically. And holds on 1x

aarrison126 said:
Its not the signal bar. I get the same Same signal strength as before about -98db of 4g. But the signal switches automatically. And holds on 1x
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Ah...I see, seems like you tried both modem and same issue, I would try flash back to TW rom and see...

[Q] Any fix for this roaming bug?

The issue is that while roaming and data enabled on roaming, Nexus 5 (stock 4.4.4r2) just shows the roaming "R" icon instead of showing E, H, H+ or LTE icons for data.
This seems to be a well known bug: https://code.google.com/p/android/issues/detail?id=71339 , but no proper solution seems to exist. Does anyone have any idea how to get rid of this "R" icon without flashing any 3rd party ROM, tried Mahdi under MultiROM, it's the same issue there under it's default settings. I'm rooted and running ART.

madarchod said:
The issue is that while roaming and data enabled on roaming, Nexus 5 (stock 4.4.4r2) just shows the roaming "R" icon instead of showing E, H, H+ or LTE icons for data.
This seems to be a well known bug: https://code.google.com/p/android/issues/detail?id=71339 , but no proper solution seems to exist. Does anyone have any idea how to get rid of this "R" icon without flashing any 3rd party ROM, tried Mahdi under MultiROM, it's the same issue there under it's default settings. I'm rooted and running ART.
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Click to collapse
if u r in roaming and network is 2g it will show R
if network is 3g it will be 3g,H,H+ or LTE

jdprocks said:
if u r in roaming and network is 2g it will show R
if network is 3g it will be 3g,H,H+ or LTE
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Click to collapse
well network is 3g, connection speed reflects 3g, but it still shows only "R"..

anyone? any patch available for this bug?