[Q] Wifi and 3g issues - Galaxy S II Q&A, Help & Troubleshooting

I have just flashed cm7 (stable) onto my phone (was using liteningrom before)
It all works fine except wifi / 3g. I cannot seem to download apps without 4/5 reboots and messing around with settings. Is this a common issue? could not see anyone with this issue for this build.
I was also thinking the change of rom may be the culprit so are there any settings in clockwork recovery that I should have done or do I need to hook phone up to kies to update the KE thing?
Sorry, I am still pretty new to SGS2 custom roms.

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[Q] cm7.1/miui issues

ive been running miui for about a month now.. after upgrading to 1.7.8 ive lost a great deal of service. i cannot send text messages, calls go through only once in a while, very very slow internet if any at all. usually causes apps to time out. ive tried every kernel and modem available. anyone experiencing this or have any idea of what i should do? any feedback would be much appreciated.
go back to your old MIUI...if same problems occur then start from scratch
1) odin to stock
2) root
3) flash the rom which was working...
i went back to stock before i did anything. then tried kernels. then tried modems. thanks though :/

How to find/fix kernel issue?

Alright, so I have a problem where my bluetooth and wifi don't work at all. Wifi status shows up as error and when I try to enable it, it just puts the phone in a reboot cycle where it starts up for a bit then restarts unless I can catch it fast enough to put it into airplane mode. From what I've been reading after doing some looking around on the net, it's most likely a kernel issue.
How can I figure out exactly what is causing this issue so I can flash over the corrupt kernel and try to get it to work? I've tried flashing 3 different roms but none of them fix the problem so I'd like to try to find a way to figure out which individual kernel is causing it.
Post what you've installed and what you're running. Usually using a ROM that does a full wipe will usually solve any issues. Are you using ROM manager to do your installs or CWM?
Originally I was having this issue on 1.83. When I used rsdlite to flash the stock 2.3.4 sbf, it fixed the issue for me. I later tried to install the new androidmarket apk and the issue came back.
Since then, I've used Tenfar's CWM to flash Ninja SF, Alien, the CWM stock 2.3.4 and am now running piCrust but I haven't been able to fix it again.

[Q] USB/Wifi Teathering stuck local-only

I'm using a Samsung Galaxy S II GT-I9100, ROM: Rootbox JB v3.2, Kernel: 3.0.15-CM-g39df795 [email protected]
I can't work out at which point it happened, but at one point of flashing JellyBean ROMs onto my phone (currently RootBox) my Wifi and USB tethering stopped working properly.
When I connect to either, I get local-only. I can ping the phone and get connections back and forth between any laptop and the phone. But I cannot get any connection to the internet. The laptops simply cannot reach the gateway.
I've tried wiping and reinstalling the ROM clean, but that also made no difference. I can flash back to ICS if needed but I think I had teathering working on an old version of RootBox.
I don't think it's the ROM doing it however as I tried other ROMs like XTreme ROM and a Cyanogen Mod ROM and they also didn't work with tethering.
Does anyone know what I can do to fix this or find the cause of the issue?
**It appears that is is being impacted by the ROM. When I clean install Cyanogenmod 9 on my phone, tethering works. But when I go back to RootBox (CM10 based rom), it stops working. I'll repost over there.

[Q] Problem with WiFi after update to 2.2

I'm having problems with my T-Mobile Vibrant after update to froyo 2.2, now the wifi is horrible and very slow, i can't download anything, i tried to fix it using this app "FXR WiFi fix and rescue" but nothing happens.
Man, I haven't run froyo in at least a year and a half. Pull up the sticky threads, get root and cwm recovery, then blast PA 2.54-360 on that sumbitch!
I am Jack's complete lack of surprise.
but do you think the wifi problem can be fixed installing a custom rom ?

[Q] Unusual? Can't get wi-fi or cell data on 4.1 ROM install

Hi,
We have 2 Vibrant phones. 1 is on Paranoid Android 2.54 (via stock eclair, ICS Passion, Slim Bean 2.9 & 3.0) and works perfectly.
The second one was on ICS Passion for a long time and I have finally got around to (trying LOL) to update it.
Here is where the weirdness begins - Flashed PA 2.54 no problems, flashed and booted up, but no wi-fi, well no wi-fi icon, and it can find a couple of wi-fi networks belonging to my neighbours, but won't find my network, 2 rooms away. The network is obviously all good, I am sending this from my laptop through said network.
Obviously I need an internet connection to get through the phone setup, so I power down, throw the SIM back in and boot up only to find no cell data either.
Skip the google account setup and get to the home screen to check things further and I find:
Calls in/out work, and most things are running, but wi-fi won't co-operate, and nothing in the APN list? Baseband and IMEI all look normal, too.
Try to flash Slim Bean 2.9 as I put the zip on the phone at the same time as a fallback and I get EXACTLY the same thing...
Anyone able to shed any light on what would cause this? Anything else worth trying? I'd like to avoid Odin as it honestly scares me reading all the problems people on here have with it...
At this point I've tried flashing both ROMs a few times with exactly the same results, I also can't go back to the ICS nandroid as the partition setup has changed and the restore doesn't work...
Thanks in advance for any help anyone can give.
Cheers...
I ended up flashing a 4.2 ROM (slim 4.2 beta 1) and it made the problem go away, I'm guessing something in the 4.1 base was broken and not getting overwritten on new installs?
ROM seems pretty sorted for a beta, few minor things not working, but hopefully it gives us a clean upgrade path...
Thanks.
I had the same issue with Slim 4.2 Beta 2. If anyone has a solution other than flashing the modem, please post.
Weird. The phone I was having this problem with now has that ROM on it and is working 100%.
I have a suspicion that flashing a ROM that uses a different kernel is what fixed it for us. I guess it just overwrites/replaces more stuff?
Maybe try hellybean 4.2 and see if it makes a difference, and if it does flash back to slim 4.2 and see if the problem comes back?
I have installed slim and other ROMs but not had this issue. Currently on jellybam
Sent from my GT-I9300 using xda premium
wendleburger said:
Weird. The phone I was having this problem with now has that ROM on it and is working 100%.
I have a suspicion that flashing a ROM that uses a different kernel is what fixed it for us. I guess it just overwrites/replaces more stuff?
Maybe try hellybean 4.2 and see if it makes a difference, and if it does flash back to slim 4.2 and see if the problem comes back?
Click to expand...
Click to collapse
The weird part is that every other Slim Bean has worked great. I'll keep my fingers crossed for beta 3.

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