Develop Bugs

[Q] Galaxy S2 Wifi and Bluetooth problems.

Hi everyone!
I recently got a t-mobile galaxy s2. After having it for a week, I rooted it and tried different roms. The last rom that I installed on it was an alpha version of cyanogenmod 9. Everything was working perfectly for a few days and then I started having problems.
The problems are with my wifi and bluetooth, they wouldn't turn on. When wifi did turn on, the phone slowed down and then turned off after a few mins. Thinking this was a cause of rooting, I decided to go back to stock. I wiped everything, formatted the internal sd card, cleared all caches and completely restored everything to stock using odin and the problem won't go away.
Now I'm running stock touchwiz gingerbread rom and when I turn on wifi, it just says "error". I was only able to get it going once and thats when the phone got extremely slow and turned off.
Also it seems like everytime the phone turns off from wifi, the battery looses like 7-10% and it gets really hot.
Here are my questions,
Is this a hardware problem?
I don't have warranty because I bought it from another person. Can I send it out for a warranty repair somehow?
Thanks in advance.

I had the Wifi error also, had to send it in for repair. Make sure you Odin everything back to stock
Sent from my SGH-T989 using xda premium

Thanks for replying.
Did your phone freeze and restart as well?
I called up samsung and they asked me to ship the phone..sent me a shipping label and etc. The problem is, I bought this phone from someone on craigslist. Will I need a receipt? So far it seems like they want me to ship just the phone.
Also I went back to stock completely with odin, do I need to do this as well?
http://forum.xda-developers.com/showthread.php?t=1578184
[Flashable] Odin/Flash-Counter Reset SGH-T989D (Telus) and SGH-T989 (Tmo)
edit: Forgot to add, how can I check if my phone is good to go for warranty repairs?
edit2: Ok I did some research and figured it out. Will update when I get the phone back

Same here...
Problem started with Bluetooth (dont remember which ROM) but I dont use wifi often so I dont know if it started at the same time. Then I switch from ROM to ROM for awhile... now my phone is kinda messed up.
I had the same problem as you, one of the phone which had a very bad battery life did not put the bluetooth to sleep and the phone got pretty hot. Something similar must have happenned to the wifi (same IC maybe?)
I think the IC is now messed up because I returned to stock, (recovery and all) did it 3 times, tried stock ICS stock GB. Then for no reason yesterday, Yay wifi working again, and bluetooth.. but by the end of the day, dead again !
So I get stuck with a wifi that can't turn on/off and a bluetooth that works when it want to...
I even tried messing with my /efs (everything was fine... I think...)
My Wifi & bluetooth MAC address are "unavailable" so I guess it's back to Samsung...
I saw some people complaining about this problem and saying Samsung products are not good... I must say that I owuld not have this problem if I stayed stock... like when I rooted my HTC desire and the "flashlight" turned on and burnt the LED... not HTC's fault... anyway anyone have another dea to try ?
---------- Post added at 03:08 PM ---------- Previous post was at 03:01 PM ----------
Also,
I read like hundreds differents forums about this issue... most if not all of them ended sending their phone to Sammy...
Some did not search very hard for a solution but still. Many have reported that Sammy changed the motherboard, so I guess it's not all our fault ?

Hi has anyone noticed issues with bluetooth headset keep getting disconnected every 2 mins after this ics update? i have Voyager pro HD which was working fine on GB and problem started after this update.

syedfaz26 said:
Hi has anyone noticed issues with bluetooth headset keep getting disconnected every 2 mins after this ics update? i have Voyager pro HD which was working fine on GB and problem started after this update.
Click to expand...
Click to collapse
Yes but it could be all related to my othe rproblems, so...

Bluetooth lost Galaxy s2 ics
I am loosing every 2 min about bluetooth since my update to ICS

Has anyone ever fixed this problem? I have been having the same problem for about a year now and I can't seem to find a solution.

I had this start with my phone around December 2012. It only affected Bluetooth, so I didn't worry too much as I don't use Bluetooth. Then my Wi-Fi started copping out about a month ago. I did some research, and it looks like it's hardware related.
I have an extended warranty that I've paid into every month since I bought it (December 2011). I called the warranty company up, and because it was out of manufacturer's warranty, I had to drop $150 on a new phone. I also spent close to an hour trying to explain to them that I had done nothing wrong to the phone. Apparently, it is in the same category as it being stolen or broken. I was so choked. I've babied this phone like crazy, in fact, it still has the protective cover you find on it when you open it fresh out of the box (I just cut off the tab). I was livid.
Well, my amazing wife ended up calling Samsung directly. The call lasted 5 minutes and they didn't even question the integrity of the phone (other than what I did to fix it and the problem itself). The representative said that because we had never called them before, they would replace it for us, free of charge. I question that they might know there is a defect that happens as this isn't a one-off, but I'm very satisfied with their service. I'll be
If you can produce your original receipt, call Samsung. They should do the same thing for you as they're doing for me. Ironically enough, I'm reverting everything back to stock and backing everything up and happened to see your post.
Hope this helps and good luck.

So just a bit of a bump/update:
I sent my phone in to be repaired (honored by Samsung) and once I got it back, it worked for a while. Shortly thereafter, it started acting up again. I noticed on the sheet showing what they did for service, was apparently doing a re-flash of the original ROM and a factory reset.
Funny thing is, I used a branded TELUS ROM that wasn't exactly stock. If you pressed and held the power button, it would automatically restart... which I found fishy. I saw that this was the exact same ROM that I had put on there once I got it back, so I doubt any flashing took place. All that was done was that factory reset.
Now, to the credit of the factory reset, it worked for a brief while, but ended up with the same issue.
I'm in the midst of doing some diagnostics, but I'm not familiar with logcat. I'm back to the latest PAC build as no other ROM made a difference. I'm going to tinker for a few more days, but I'm pretty sure I'm back to square one.

HELP! My Note 2 won't connect to Internet

Hey guys,
Today my Galaxy Note 2 dropped 2 times from like 70 cm.
No defects apart from the fact that Internet doesn't work if not on wifi :s
I reflashed the last mb2 stock rom via odin so I can safely exclude software/settings probem right now....
What can I do?
I'd like to not bring it to Sammy because it would take at least 2 weeks and I wouldn't know how to live.
Soo, what would you check first?
Sent from my GT-N7100 using xda app-developers app

Not sure about the wifi antena location tho, but I one had the back cover not completely closed. On the back of it there are 2 pinns which where not propely connected, as soon as I closed it, all started to work as it should. Take your back cover out and see of the pins from the phone and from the back cover are in good shape!
Other than that it sounds as you might have damaged something, I hope that it is not the case

You have just reflashed ROM or also factory reset it?

Thank God it's nothing internal guys.
I changed the sim and Internet works again.
My last sim was a normal sized sim, cut by hand to fit the nanosim slot.
Maybe it has moved a little bit when the phone dropped.
What I still can't understand is why cell line is ok and internel is not, and why internet won't start if I re-insert it ( tried three times ).
It seems like the sim got damaged when the phone dropped ( as strange as it sounds ).
It's not more a priority anyway, in fact if mods want, this thread can be closed.
Thank you.

WiFi and Bluetooth stuck at turning on.

For the past two days I have been having issues where my wifi and Bluetooth wont turn on. The problem started after rooting. I unrooted and returned the device to normal status and no binary downloads but eh problem persists. right now both will turn on and off fine but every once in a while they get stuck at turning on. after a few resets and simply waiting everything goes back to normal but this has happened at least 5 times since yesterday. On my s2 I had a similar issues with GPS. the only solution was to do a factory exchange. I am already set up and the replacement will be sent once the phone is back in stock. I was just curious if anyone had a similar problem and resolved it without having to exchange the phone.

flexte said:
For the past two days I have been having issues where my wifi and Bluetooth wont turn on. The problem started after rooting. I unrooted and returned the device to normal status and no binary downloads but eh problem persists. right now both will turn on and off fine but every once in a while they get stuck at turning on. after a few resets and simply waiting everything goes back to normal but this has happened at least 5 times since yesterday. On my s2 I had a similar issues with GPS. the only solution was to do a factory exchange. I am already set up and the replacement will be sent once the phone is back in stock. I was just curious if anyone had a similar problem and resolved it without having to exchange the phone.
Click to expand...
Click to collapse
Another member had an issue similar to urszhe said he did a warranty exchang thou, couldnt figure it out.
Sent from my SGH-T889 using XDA Premium HD app

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I haven't had any problems today but I know as soon as I loaf all my apps back it will happen again. To be on the safe side I am just going to return it before it gets worse.

I'm having the same problem. Did you go through T-Mobile or Samsung for your replacement?

Went through tmobile. It's been good for more than 24 hours but I don't trust that it won't come back. Then phone is back ordered original would have had the new one by now.

Yeah, it actually started working for about a day, but stopped working when I left the house. Just went to T-Mobile to process the exchange, but they're telling me they can't do it due to the IMEI stating it not being "sold" through a T-Mobile store. Which is odd, because I bought it at a T-Mobile store at full upgrade price while my roommate was working. I have the invoice somewhere here...
Time to jump through hoops to get this replacement.

gaticaag said:
Yeah, it actually started working for about a day, but stopped working when I left the house. Just went to T-Mobile to process the exchange, but they're telling me they can't do it due to the IMEI stating it not being "sold" through a T-Mobile store. Which is odd, because I bought it at a T-Mobile store at full upgrade price while my roommate was working. I have the invoice somewhere here...
Time to jump through hoops to get this replacement.
Click to expand...
Click to collapse
I noticed it usually gets stuck when I leave the house as well. Do you use airplane mode a lot? when I am home I usually keep my phone in airplane mode with Bt and wifi on. the first time this happened I also noticed the wifi looked as if it was connected when i was a mile from home and i had to power down to get a cellular signal. I have had the phone since day one and this just started last week after I rooted. Since many people have rooted and this isn't a known issue I guess its best for us to return the phone and see what happens with the next. Find your invoice and they have no choice to replace it. If you paid by credit card that should work as well. Just show them your statement.

flexte said:
I noticed it usually gets stuck when I leave the house as well. Do you use airplane mode a lot? when I am home I usually keep my phone in airplane mode with Bt and wifi on. the first time this happened I also noticed the wifi looked as if it was connected when i was a mile from home and i had to power down to get a cellular signal. I have had the phone since day one and this just started last week after I rooted. Since many people have rooted and this isn't a known issue I guess its best for us to return the phone and see what happens with the next. Find your invoice and they have no choice to replace it. If you paid by credit card that should work as well. Just show them your statement.
Click to expand...
Click to collapse
I don't use airplane mode at all. T-Mobile gave me the run around so I decided to go through Samsung for my replacement. They originally wanted me to send my phone in for repair, but no way am I going to be without the Note for more than a day.
A Samsung Experience Shop popped up in Best Buy just outside of Chicago. The woman running it wasn't a Best Buy employee, but a Samsung Specialist. She troubleshooted my phone (Factory reset it, even though I told her I already did) and Wifi and Bluetooth didn't work at all. She called her contact at Samsung and they're having a replacement sent to the store that I'll pick up when it comes in and exchange. Good news is that I don't have to send in my Note and have to wait on it!

I haven't had a problem in two days but my replacement is on the way so I will just wait and see if it happens on my new one

OP, I had the exact same issue as you. Wifi and Bluetooth just stopped turning on, intermittently at first. After trying to figure it out for a month or so I decided it must be a hardware issue. Wifi and Bluetooth are controlled by the same integrated Broadcom chip, which might be a common failure point.
I sent it in to Samsung, and they have had it for 2 weeks now... I just got word that it's fixed and shipping back to me. They replaced the PBA (main board).
I have a question. How did you get service through T-Mobile? I bought mine at a T-Mobile store and I was outside of the 30 day return policy. I was under the impression I had to go through Samsung for a defect, or T-Mobile for an insurance claim (pay deductible).

LucJoe said:
OP, I had the exact same issue as you. Wifi and Bluetooth just stopped turning on, intermittently at first. After trying to figure it out for a month or so I decided it must be a hardware issue. Wifi and Bluetooth are controlled by the same integrated Broadcom chip, which might be a common failure point.
I sent it in to Samsung, and they have had it for 2 weeks now... I just got word that it's fixed and shipping back to me. They replaced the PBA (main board).
I have a question. How did you get service through T-Mobile? I bought mine at a T-Mobile store and I was outside of the 30 day return policy. I was under the impression I had to go through Samsung for a defect, or T-Mobile for an insurance claim (pay deductible).
Click to expand...
Click to collapse
I just called tmobile and they sent me a new one. I had a problem with my black berry a few weeks ago and thought i had to send it in for repair but tmboile sent me a new BB as well. usually most phones have a year factory warranty and tmobile is the one that handles that. My phone hasn't acted up in a few days but i am going to keep the replacement and send my old one back just to be on the safe side.

Anybody with a solution for this? Mine started acting up 2 days ago and I'm now a grumpy man.

Are you on custom Rom, and which Rom is it if you are
Possible fix: Odin to stock(sure way to check, or redownload Rom and wipe three times and reflash Rom
Report back
Sent from my SGH-T889 using xda premium

muz4 said:
Anybody with a solution for this? Mine started acting up 2 days ago and I'm now a grumpy man.
Click to expand...
Click to collapse
just return it to Tmobile

OmmNomNom said:
Are you on custom Rom, and which Rom is it if you are
Possible fix: Odin to stock(sure way to check, or redownload Rom and wipe three times and reflash Rom
Report back
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Doesn't work. I'm on stock all the time btw. And I did the wipe 3 times and flash stock again too.
flexte said:
just return it to Tmobile
Click to expand...
Click to collapse
I'm now in Malaysia for another 3 months and a half. Won't be able to find any T-Mobile here. Any suggestion?

if you are on stock already, then it possibly is hardware

My problem started after I rooted using toolkit. I unrooted and rooted using stock injected but the problem persisted. I had to return the phone so I unrooted and used triangle away to get my phone back to normal. I did a hard reset and had the problem one more time. for the 5 days it took my new phone to arrive i didn't have the problem more than once. I also remember having a problem with my printer saying it was connected but i couldn't print from it until i reset the router. I think the time my phone started working find again was when I reset my router but i didn't put all this together until recently. I noticed that the only time I had the problem was when I had wifi and BT connected and went into airplane mode. then when I came out it didn't always connect back like it use to. I also noticed it when i had wifi connected and left my house. the wifi looked like it was still connected even though i was more than a mile form home. So maybe it had to do with my router connection and a bug where the phone thought it was still connected. if anyone is having this problem try resetting your router and see if the issues persists.

flexte said:
My problem started after I rooted using toolkit. I unrooted and rooted using stock injected but the problem persisted. I had to return the phone so I unrooted and used triangle away to get my phone back to normal. I did a hard reset and had the problem one more time. for the 5 days it took my new phone to arrive i didn't have the problem more than once. I also remember having a problem with my printer saying it was connected but i couldn't print from it until i reset the router. I think the time my phone started working find again was when I reset my router but i didn't put all this together until recently. I noticed that the only time I had the problem was when I had wifi and BT connected and went into airplane mode. then when I came out it didn't always connect back like it use to. I also noticed it when i had wifi connected and left my house. the wifi looked like it was still connected even though i was more than a mile form home. So maybe it had to do with my router connection and a bug where the phone thought it was still connected. if anyone is having this problem try resetting your router and see if the issues persists.
Click to expand...
Click to collapse
I used the toolkit in the original development thread, could it be the method you used for rooting caused that?
Is the problem there if you connect to Wi-Fi on a different router, like someone else's
Sent from my SGH-T889 using xda premium

OmmNomNom said:
I used the toolkit in the original development thread, could it be the method you used for rooting caused that?
Is the problem there if you connect to Wi-Fi on a different router, like someone else's
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
I never tried connecting to another router. My problem seemed to be that it never properly disconnected from my router so when I came out of airplane mode of couldn't connect. Also bluetooth was stuck.

WiFi and BT won't connect.

Hi All,
I searched and read a dozen post for this and have yet to find a solution. I made repairs to this Note 2, replaced the USB/charger board. The phone had been wet. This fixed the first problem, but now I have a new one.
I installed CWM recovery and installed a stock rom in order to obtain root and,,,,,,,,,you get the idea. I have flashed back and forth between several roms, inc Jedi and three or four stock versions. Yesterday I had WiFi for a few hours. This morning when I got up and turned it on, I can't get it to connect to WiFi or BT. It just says "turning on" and does nothing.
The phone is unlocked and on AT&T network. It has 4.1.2 JZ054K. UVBMD1 in it. I've tried many combinations of modems, kernels and roms. I've tried to match them and tried combos. No luck.
Because I had it apart, I fear a hardware issue. I'm hoping someone will have a suggestion that will allow me to keep the "unlock" and connect to WiFi. When I flashed the custom rom, it appered I lost my "unlock". Of course I got it back when I flashed back to stock.
Any ideas would be greatly appreciated.

Got it figured out.

stevespens said:
Got it figured out.
Click to expand...
Click to collapse
What was it
TWEAKED 2.5

BACARDILIMON said:
What was it
TWEAKED 2.5
Click to expand...
Click to collapse
When I repaired the board, I had it disassembled down to having the mother board out. Evidently when I was handling the mother board, I pushed down the little contact tabs that make contact with the back body panel which make contact with the antennas. I found a video which showed me which antennas were which. Once I reassembled the phone, it worked fine.
So it turned out to be a hardware issue after all,,,,,,,,,of course I caused the issue.

stevespens said:
When I repaired the board, I had it disassembled down to having the mother board out. Evidently when I was handling the mother board, I pushed down the little contact tabs that make contact with the back body panel which make contact with the antennas. I found a video which showed me which antennas were which. Once I reassembled the phone, it worked fine.
So it turned out to be a hardware issue after all,,,,,,,,,of course I caused the issue.
Click to expand...
Click to collapse
Good to know.
TWEAKED 2.5

p600 wifi turning off on of on off on....

Ok this started last night, tablet has been working flawlessly for the last 6 months or more.
What happened was, I wasn't able to use the Internet. Just wasn't working. And every 20 seconds or so it would flash up at the bottom of the screen "connected to (my router)".
So I turned wifi off and on, which usually fixed connection issues, but didn't help. I also restarted router, even though my computer and my phone isn't having any issues.
So then I went to the wifi settings screen to see if there was any way to reset networks. What I saw was this:
If i turn wifi toggle on and watch the screen, it would scan for networks, find the list... Couple seconds pass... Then the toggle would switch itself off and back on! And then it would start looking and finding networks again, and then off and on, and etc etc.
I have tried a factory reset and cache reset.
I have also downloaded the 4.4.2 stock rom and installed using odin for a totally new install.
Still does it.
Any suggestions? Seems very strange. It's under warranty but it seems like an odd hardware fault, seems more like software but I dunno.
Help me xda, you're my only hope.

I've been searching the Internet all day trying to find someone else havin this problem... But I seem to be the only one. And noone seems to have any suggestions.
At the moment I'm having to consider a warranty dispute, but that means however many days/weeks without the tablet which I use on a daily basis.
Not ideal Samsung.

nirurin said:
I've been searching the Internet all day trying to find someone else havin this problem... But I seem to be the only one. And noone seems to have any suggestions.
At the moment I'm having to consider a warranty dispute, but that means however many days/weeks without the tablet which I use on a daily basis.
Not ideal Samsung.
Click to expand...
Click to collapse
Hey. I had the EXACT same problem. Even made a video of it and showed it to the service point personell. Turning on off on again and again, it also displays in the settings the switch just switches itself without any action of mine. It was a hardware defect. send it in and get a new one, better than being annoyed by it. Mine did it on a 5-10sec interval length...

Keks1234 said:
Hey. I had the EXACT same problem. Even made a video of it and showed it to the service point personell. Turning on off on again and again, it also displays in the settings the switch just switches itself without any action of mine. It was a hardware defect. send it in and get a new one, better than being annoyed by it. Mine did it on a 5-10sec interval length...
Click to expand...
Click to collapse
Yeh mines probably every 5-10 seconds...
So this is definitly a hardware fault? In which case I'll have to get in touch with john lewis and hope they will do an exchange in store. If it involves having to send it off to samsung and waiting for it..
Anyway thanks for replying to the question, shame it wasn't better news haha!

nirurin said:
Yeh mines probably every 5-10 seconds...
So this is definitly a hardware fault? In which case I'll have to get in touch with john lewis and hope they will do an exchange in store. If it involves having to send it off to samsung and waiting for it..
Anyway thanks for replying to the question, shame it wasn't better news haha!
Click to expand...
Click to collapse
yeah sorry to be the one to tell you this is a faulty device but it seems like this unit ain't free of errors and there quality control is somewhat sketchy.
Which android version are you running? I am asking because I run kitkat and also have relatively ****ty battery life. I use it for university so I have the screen on and write notes during lectures. Usually it lasted 7-8hours but for about a week or two it now only lasts 4-5 hours of screen time which is really ****ty.
I read somewhere that this might be a motherboard issue and if it is it might be somewhat corellated to our wifi problem. In my case they replaced the wifi module and gave me back my "old" device but this is having bad battery life so I am thinking about sending it in (again). I did however root so I would have to make use of the warranty provided by the seller, not samsung itself, since my knox is tripped.
(in Germany the sellers also must provide 6months - 2 years of warranty and there was a judgement in Europe that rooting must not have any influence on wether your device still is under warranty or not. sadly this only applies to the warranty provided by the seller, not the manufacturer)

Is your BT on and are you connected to a 2.4 GHZ network?
If so, turn off BT
I get random WiFi disconnects and reconnects from 2.4 GHZ networks when BT is on but not connected. Though, Ive never noticed the wifi switch going off and on.

I am running 4.4.2 or whatever, kitkat anyway.
Bluetooth is off, I never use it on my tablet. I dunno what network type I'm running, might be N or might be B/G, but whatever it is it what it has been for months as I havent changed any router settings lately.
I have restarted the router twice already in case this was a network problem, but the network wouldn't cause the wifi to toggle off and on, it would just cause disconnects etc. Least I assume so. I may try this just in case but like I said the network type hasn't changed lately

John Lewis are saying they won't exchange it, it will have to be sent off to Samsung for "repair". Meaning I'll probably get sent back a refurbished second hand one with a dodgy light bleed screen, as I expect they have hundreds of those lying around now.
Oh and it'll be up to 28 days. For a premium and expensive device that's less than 6 months old this just isn't good enough.

nirurin said:
John Lewis are saying they won't exchange it, it will have to be sent off to Samsung for "repair". Meaning I'll probably get sent back a refurbished second hand one with a dodgy light bleed screen, as I expect they have hundreds of those lying around now.
Oh and it'll be up to 28 days. For a premium and expensive device that's less than 6 months old this just isn't good enough.
Click to expand...
Click to collapse
I had mine replaced as well but dont remember wether I got a new one or just my old one repaired... should have written down the IMEI I guess :-/
you're from Bristol, don't the EU rights apply there? If so your retailer should be obliged to replace or repair the device.
http://forum.xda-developers.com/showthread.php?t=1998801
Anyways my replacement was done through Samsung and it took 6 days. But then again idk differences between UK and Germany...