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[Q] Random rebooting, not shutdowns.

I'm having a rather specific and odd problem with my captivate(s), three of them to be exact. First I bought the phone, upgrading from an Iphone 3g, and the first day it was great, the second day, in the evening, I noticed that it started this strange rebooting loop. The phone doesn't seem to power off because I don't see the Galaxy S symbol it just merely goes black then comes back and searches for the network, finds it, then a few minutes later goes black again, returns, search for the network, and so on. It keeps doing that over and over again. So I tried a factory reset the next morning just to make sure it wasn't a problem with any apps installed. The same rebooting loop happened. So I called a rep and dropped by the ATT store and they said it might be the sim card, which was very very old (still said cingular) so we swapped it. Same problem the next day. Okay so I went and I replaced the whole phone. The second day with Captivate #2, this rebooting loop occurred again. The reps told me that I might have gotten two bad ones and to exchange it again, so I did. And yet again I have the same problem. So here are some quick facts about the problem that I have learned. Total time span has been about 3 weeks.
-The most important thing to know about this issue is that the only thing that prevents the phone from going into this rebooting loop is if I enable flight mode, no network connectivity. I believe wi-fi is okay but whenever I disconnect from ATT's network it stops rebooting.
-Occurs more frequently at night/evening (only happened once in the morning)
-Is not affected by signal strength, full bars, low bars.
-Is not affected by installed apps (Had done factory resets and with my third captivate all I did was put the sim card in and put it in my pocket)
-Is not affected by battery status, low or full
-Doesn't seem to matter if I have a lot of things running or nothing running, the loop starts when I'm browsing, texting, in a call, or just locked in my pocket.
-Does not seem to be affected by charging source (wall, car, laptop, ps3/xbox)
Another thing to note is that I had an Iphone 3G with an unlimited data plan before this. The Captivate upgrade was done on another line on my family plan then given to me with a 2gb data plan. After talking to multiple reps over the phone, they said they had the wrong IMEI number (I have no idea what that means) but that leads me to wonder what else is wrong and is it a problem with the Captivates or ATT itself?
I really need some feedback because I'm about to just give up on this phone, which is heartbreaking because I fell in love it. My 30 days is approaching and if I am indeed returning it, it'll have to be very soon. What do you guys think?

[Q] help with spontaneously unrecognized SIM card

Ok, I'm going to give you guys the whole background story just to cover all the bases.
I've had a Nexus S for about 6 months, never had a hitch. Rooted it, etc etc all fine and dandy.
About two weeks ago, I updated it to CM 7.1 RC1. So far so good.
I've always had the same Vodafone SIM card, which has accompanied me through a couple of phones. Last week, I went to London and bought a UK pay as you go card, to use data without roaming. Perfect. No problems whatsoever.
So, to make it clear, I never had problems with my original (portuguese) SIM card, nor with the british one I had just bought.
However, it was upon my return that I realized I had forgotten my SIM card at my friend's house. I quickly stopped by the Vodafone store at the airport, where they promptly gave me a new SIM, ready to use within a couple of hours.
Since then, my phone after a short period of being on, spontaneously fails to detect the SIM card/no longer recognizes it. I've tried scanning for networks in the settings, but it won't let me register again. It takes a reboot to get it working. Thing is after a couple of minutes or hours, it happens again.
I have since exchanged the new SIM card with a newer one , also from Vodafone, albeit a different store. Yet, the problem persists.
I didn't alter any settings between Portugal-UK-Portugal, so everything should be exactly the same. Does anyone know how to solve this or why this happens?
Faulty phone?
Faulty radio?
Faulty SIM cards?
ROM bug?
Any help is appreciated.

[Q] Can not end calling on Nokia Lumia 800.

I bought Nokia Lumia 800 about 1week ago, I've found a lot of bugs, most of all is that I can't end the call when after someone calling me. Nothing changed though I press the end button, at the top of the screen, it displays 'end calling', I can press back to open other apps, but the it's still maintain there. Few minutes later, it's gone automatically. But sometimes, it will reboot.
Someone said it's because of the sensor at the top right of the screen, if receive calling, do not hang up in the dark.
Someone said turn of 3G in the 'network', someone said turn on the 'roam', I've tried all of the them but none is work, can someone help me of it?
I have to say I have already regreted for buying it.

The two major issues I have read about the Lumia 800 are battery drain and end call issues. The latter does not seem to have a fix yet.
Did you cut your sim?

Of course I cut my sim. Someone said they have already fixed this problem,and I don't know how.
End calling issue seems just happened to nokia, other brands like HTC or sumsung haven't reported such problem like that.

It happened on my Omnia once i guess, but it only lasted about 30 seconds, and after that the phone was acting just fine, no reboots nor anything. Idk if it's the same tho...

ilovewp said:
Of course I cut my sim. Someone said they have already fixed this problem,and I don't know how.
End calling issue seems just happened to nokia, other brands like HTC or sumsung haven't reported such problem like that.
Click to expand...
Click to collapse
The reason I asked was people were trying to find a pattern to see if it was a cut sim issue. Some carriers offer micro sims.
If you can I would exchange it. Or return it.

My Lumia has problems in USSD operations too along with this call not ending problem

It occurs mostly in the devices in India as operators push remaining prepaid balance through USSD . Even *123# is not working for me sometimes. Lumia sure has some problems with USSD operations.

I sometimes get this problem on my DVP as well.

Before releasing A handset's phone functions should be thoroughly checked in all the markets where the handset has to be released.. These problems are unbearable

Signal Dropouts

hey!
I have a problem with my One Mini. I have constant signal dropouts. Phone calls stop after a second, also losing data-connection all the time and always seeing the message "Preparing SIM-card".
It feels like my phone having problems with some mobile-cells. Usually I have to try to call someone 3-4 times, and after 3-4 attempts I can talk normally without getting interrupted after 1-2sec - like my phone found the correct cell or something like this.
I tried
- my second (O2) sim-card
- put some tape on top of the sim-card (solved this problem for people with different phones)
- put some signal-tweaks in my build.prop
- changed network mode (WCDMA/GSM/LTE...)
but nothing helped.
I am on O2-Germany for many years and never had those problems, my One S was working fine (before it got bricked )
Had the same problem last month in France...
anyone else having this problem? could this be kernel-related? I'm using JMZ`s kernel. But I guess this is more a radio-problem, or?

theodorius123 said:
hey!
I have a problem with my One Mini. I have constant signal dropouts. Phone calls stop after a second, also losing data-connection all the time and always seeing the message "Preparing SIM-card".
It feels like my phone having problems with some mobile-cells. Usually I have to try to call someone 3-4 times, and after 3-4 attempts I can talk normally without getting interrupted after 1-2sec - like my phone found the correct cell or something like this.
I tried
- my second (O2) sim-card
- put some tape on top of the sim-card (solved this problem for people with different phones)
- put some signal-tweaks in my build.prop
- changed network mode (WCDMA/GSM/LTE...)
but nothing helped.
I am on O2-Germany for many years and never had those problems, my One S was working fine (before it got bricked )
Had the same problem last month in France...
anyone else having this problem? could this be kernel-related? I'm using JMZ`s kernel. But I guess this is more a radio-problem, or?
Click to expand...
Click to collapse
I haven't had this issues, in fact, I went camping last weekend and most of the time I was able to get 1 bar when everyone else didn't have service at all. I'm using the AT&T variant on AT&T with the WWE DeOdexed Stock ROM and Jmz's Kernel 09-04-13. I attached a picture of my kernel, baseband, build, ect. I'd suggest making a backup and restoring your phone to stock to see if it's a software issue.

[Q] Reboots after low battery

I have read all in xda about; fast battery drain, reboots and unstability to 905. This because my 905 has this isues. I have sent it back to repair 3 times...they have changed the motherboard twise and then battery. I still had these problems! 2 weeks ago I removed my sim card to put it in my wifes cell phone. After that i only use the wifi one my 905. Now I have no reboots, no unstabilety no battery drain...... why!
If one of you out ther ho has this problem can give this a try....
parden my bad english!

Finally!
This tablet worked perfectly at the very beginning. Then an update came and I started to have random reboots. Couple per weeks. In last weeks - few per day.
I removed sim card 2 days ago. And so far I didn't get even single reboot.
Thank you!
But... The questions is:
is there something wrong with some particular SIM cards, or is there another way to solve our issue?

Faulty SIMcards can cause all kinds of issues, from connectivity to reboots and even errors that seem unrelated. I see customers with those problems every day. Have you tried using a different SIM?
Also, older as well as cut SIMcards are known to cause problems, as well. Cutting a regular SIM to Micro size has a 86% chance to damage the SIM.