[Q] AT&T - Won't Switch between Edge and 3G - Vibrant Q&A, Help & Troubleshooting

I've got my unlocked Vibrant running on AT&T, but I can't seem to get it to switch between Edge and 3G. I can go into the settings and set it to stay in WCDMA mode, but then when I'm in an area of bad reception I end up missing calls (All through VOIP).
When its setup for Edge/WCDMA it will stay in 3G at first, but when 3G gets too low and it goes to Edge it won't go back to 3G at all.
I've tried switching modem versions but I'm guessing its unrelated to that.. well, actually all Vibrant modems are going to be setup for Tmobile anyway, maybe a Captivate modem is the solution, I'll try that and get back.
Does anyone have any ideas of how I can get it to switch properly?
If this modem install doesn't work I'm all out of things to try.
Thanks.

As far as I know (and I could be wrong), you can't flash a Captivate modem to the Vibrant, it just makes the radio useless.
You will have to use Vibrant modems, since they are designed for the hardware IN the Vibrant.

Related

[Q] Not able to connect to Internet

Wondering if you can help me.
In my office my colleuge and I have an hd2 on UK o2 pay monthly. Untill about a month a go we were getting HSPDA internet access. Now we are only getting EDGE. I contacted o2 and they stated that the area is a very high coverage area and we should be getting HSPDA.
What makes matters more interesting is two other colleuges in my department in the same building, one has an iphone 3 and the other has an iphone 4, both guys are on uk 02 pay monthly and are getting full 3g access. I am getting 3g and hspda in other areas.
Does anybody know why we are getting edge instead of at least 3g?
thanks.
I had a very simillar issue, so perhaps the solution I found will work for you. A co-worker of mine bought an HD2 (immediately after seeing mine). In many areas at work the reception was terrible. I also noticed that at home, when I first had the phone I got 3G often, but after a few weeks I was suddenly stuck on the EDGE network (If I got any reception at all). Since messing around with the Android port I was forced to flash a new Radio ROM and it seems that was my problem all along. At home I now get constant full bars HSPDA. At work I get reception in places that I never did before. My coworker (still using stock radio) is having the same reception issues I used to have.
So my advice is try a few different radios and see if that helps.
Faelok said:
I had a very simillar issue, so perhaps the solution I found will work for you. A co-worker of mine bought an HD2 (immediately after seeing mine). In many areas at work the reception was terrible. I also noticed that at home, when I first had the phone I got 3G often, but after a few weeks I was suddenly stuck on the EDGE network (If I got any reception at all). Since messing around with the Android port I was forced to flash a new Radio ROM and it seems that was my problem all along. At home I now get constant full bars HSPDA. At work I get reception in places that I never did before. My coworker (still using stock radio) is having the same reception issues I used to have.
So my advice is try a few different radios and see if that helps.
Click to expand...
Click to collapse
Yea we did try that the other night thinking it might be a radio issue we went from 2.5 up to 2.12. What rom / radio did you use if you dont mind me asking?
Does anybody else have any ideas? This is happening with two ok uk hd2's in the office! My colleuge and I have tried multiple rom and radio upgrades but nothing is working but my other colleuge on iphone can get 3g sitting beside me
ive had this issue too, never knew how to fix it :/
AGHHHHHHHHHHHH Going to call o2 tomorrow and tell them I want to swap for a new phone, I am not getting the service I should be!!!
Ive tried just about everything I can think of. Ive tried updating the ROM, Radio, rilphone.dll - also tried going back to stock rom, yet my colleuge sits on his iphone right beside me on 3g its madness!
have you tryed puting your phone into flight mode then .ack on again let thephone pick the strongest hsdpa mast signal up. welcome to tbd way o2 works lol we get it all the time in york and leeds
That is a very interesting idea. I will try and report back thanks man!
I am really getting no ware with this. Phoned O2 and they tested phone in my network said that I should be ok I should have full hspda access, my colleuge is sitting on iphone with ull 3g and has a o2 dongle which has hspda access. I am getting fulll signal strength, changed the sim card and tried multiple radio and dll file combos and this is driving me nuts. Any help would be appreciated.
I have been doing some further testing and found something interesting. When I am at home and can connect to HSPDA. I went into the base band and changed it to WMCDA got full access. I then changed it to GSM band and got Edge. I then went into work to test it and tried to force it to WMDCDA but it wouldn't even connect at all no coverage.
I tried it back on GSM and full coverage but only edge support. Any ideas?

[Q] Vibrant on AT&T

Hey Guys,
I've got my Vibrant on AT&T but I seem to have a problem with the Vibrant modems, whenever I'm on the 2g/3g mode it'll stay on 3g until theres low reception then it'll drop to 2g. The problem is that once it drops to 2g it won't go back up to 3g, no matter if reception increases.
I saw a post in the development section about I9000 modems working on the Vibrant on the CM7 ROM, I've been trying the modems on the latest CM7 nightly, but even though they install fine I'm getting truly horrible signal. I've also tried a couple Captivate modems but I'm unsure whether they're meant for the CM7 ROM on the Vibrant or not, nothing I've tried seems to work well.
I'd post in the development section but I'm low on posts so I'm not allowed:
Would anyone know if I9000 or Captivate modems would work better on AT&T?
And possibly where I can find the modems that would work on the Vibrant with CM7?
Thanks, this problem has been bugging me for awhile already..
In Chicago area I have very strong 3g signal so it does not drop to 2g. On the other hand, when I was in Florida my phone stayed on 2G most of the time, but it would switch to 3G in more populated areas. I use KB5 modem.

[Q] 3G not working

i have a samsung galaxy vibrant t959 2.3.5 everything works great but it never connect to 3G is always on the EDGE network how can i get it to work on the 3G I KNOW THERES COVERAGE here its just the phone any help
Maybe its just tmobile, ive had the same problem for a while now, its just that i rarely get 3g and then some days i get it for ours
Sent from a cell tower to the XDA server to you.
Maybe try flashing a different modem. Since you are in Mexico another one entirely might be just what you need.
i try flashing a couple of modems but still no luck is there any modem that you can recomend please

AT&T Vibrant working..kinda. Any Suggestions?

Okay everyone. After alot of trial and error. I got my Samsung T-mobile vibrant working on AT&T. I'm running Whiskey Nextgen 2 Rom and everything seems to be working fine except signal strength. I've read about how the Vibrant only picks up 2 of the ATT signals or whatnot but I have NO signal inside the building where I work. My question is whether an AT&T radio can be flashed to the phone so that its basically an AT&T phone with decent signal. Any help would be greatly appreciated.
Yeah, you can flash a captivate radio.
Sent from my GT-I9000 using xda premium
Thanks Ali!
My girlfriend is using her vibrant on ATT without any issues. How good was the reception in the building before getting a vibrant?
T-Mobile Vibrant not working on 3G network from AT&T
Could you use 3G with AT&T network?, because I couldn´t, just Edge, which is very slow,any recomendations on this matter? I heard this device doesn´t support 850 mhz, is there any way to make it happen?
Zimmerman9 said:
Could you use 3G with AT&T network?, because I couldn´t, just Edge, which is very slow,any recomendations on this matter? I heard this device doesn´t support 850 mhz, is there any way to make it happen?
Click to expand...
Click to collapse
No 850mhz. You can get AT&T 3g in the areas they use 1900mhz though.
Ultimate83 said:
My girlfriend is using her vibrant on ATT without any issues. How good was the reception in the building before getting a vibrant?
Click to expand...
Click to collapse
Well I had a Captivate but it was stolen from my home during a burglary some months back. I had left it home because it was one of those "shut off" models that would constantly shut down on it own and I was using my more dependable iphone 3gs while at work. That being said, I had 3 bars inside the building. With the Vibrant on the ATT network, I'm sitting at 0. Cannot connect to the market or anything. At home, the Vibrant signal is fine but I need a happy medium and I'm still recuperating from the break-in so I cant just go out and purchase a new ATT phone at this time.
The more I read about flashing radios though, the more concerned I am about doing so. I was under the impression that the radio had to match the kernal and my kernal version is 2.6.32.9 so I dont know if the cappy radio will match.

[Q] 3g Issues on SGH-i527

Hello guys, am having this particular model and the pain is I don't have lte yet in my country but we have 3g networks operating here. Ever since I had this phone, I have not been able to turn the 3g on. It always run on edge. I have use the key combination to bring back the hidden TESTING option trying to change it to wdcma only but the network does show even though it does on a different fone. Was running 4.2.2 and it was having the same issue. Thought I could get the 3g after flashing the 4.4.2 but it still the same issue.
I Need help guys since the edge runs very slow in terms of data speed.

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