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[Q] Can random re-boots be caused by a bad sim card?

Hi all,
I have my primary phone which is an international SGSII and I have my Infuse as my secondary phone.
I experienced random reboots on my SGSII which I couldnt seem to explain and I started using my Infuse for a while now and it has now started to randomly reboot which it only has started doing since I put my sim card in it and had NEVER done it with no sim card in it so... Can these issues be being caused by a bad sim card?
The card itself is a bit old...
Please advise...

Anything's possible i guess, if you didn't change anything else or install any software on both that might have caused i would assume it would be the sim card.
Try one or the other for a day without the sim card and the other with sim card and see what happens. Then switch and re-test.
Interested in knowing if it's the sim card or not, as a last resort you could just buy a new sim card from an AT&T store.

Bandit_Kaine said:
Anything's possible i guess, if you didn't change anything else or install any software on both that might have caused i would assume it would be the sim card.
Try one or the other for a day without the sim card and the other with sim card and see what happens. Then switch and re-test.
Interested in knowing if it's the sim card or not, as a last resort you could just buy a new sim card from an AT&T store.
Click to expand...
Click to collapse
Thanks for the response... I have switched out the cards again to see what is going to happen.
And just so you know... I'm in Canada on the Rogers network... not with AT&T...
Sent from my SAMSUNG-SGH-I997 using xda premium

yiannisthegreek said:
Thanks for the response... I have switched out the cards again to see what is going to happen.
And just so you know... I'm in Canada on the Rogers network... not with AT&T...
Sent from my SAMSUNG-SGH-I997 using xda premium
Click to expand...
Click to collapse
Very possible since Samsung has implemented (since the Galaxy Tab 7" i think) a little "feature" where it forces your phone to reboot when it cant see the SIM. Its possible that the SIM is loosing contact and forcing a reboot. Hard to be sure though.

[Q] Cant make calls

Hi, i'm from brazil, i bought the cell in Ebay locked, i rooted and unlocked, after about 3 hours it has stopped working, cant make call, internet, nothing..i already tried install ZEUS rom, but still not working, back to stock and nothing, when i try make call appear "Network not available" and emergency call "Out of service area", so anyone can help me?
ps: sorry my english

anyone can help please

during those 3 hours
did it make phone call ??

Did you try a battery pull?
Sim pull?
New sim?
Umm.. did you cally Sammy? Remember.. they <3 you.. lol...
Good luck.

are the apns set?

during those 3 hours
did it make phone call ??
Click to expand...
Click to collapse
yes, and sms too
are the apns set?
Click to expand...
Click to collapse
when i click in "mobile networks" appears: Insert Sim Card (Insert SIM card to access network services), but sim card is inside

pajezaum said:
yes, and sms too
when i click in "mobile networks" appears: Insert Sim Card (Insert SIM card to access network services), but sim card is inside
Click to expand...
Click to collapse
New sim..
Sent from my A500 using Tapatalk

is this possible a burnt sim？ it happen on my brothers iphone 4s . it burnted 2 sims in 1 week
Sent from my SAMSUNG-SGH-I997 using XDA App

Optimus-Prime said:
are the apns set?
Click to expand...
Click to collapse
the APN are not needed for calls. just to surf the Internet
Correct me if I'm wrong.
what you say. I think the SIM is burned. try a new and tell us how it goes
Sometimes the server of my operator falls and I can not make calls or messages.for about 5 minutes. or up to 6 hours

I would try a total reset first GTG's Ultimate Unbrick http://forum.xda-developers.com/showthread.php?t=1116251
If you're interested I can host that file. If that is OK with the Author that is

Hi Pajezaum
I'm from Brazil São Paulo as well and bought my Infuse August last year.
Mine I bought it unlocked, to prevent this kind of problem, .
Anyway, I'm using Claro and it's working perfect, stock factory ROM.
I suggest you test another sim card, even try from another mobile provider.
Infuse is Quad-band, so maybe it's not a frequency problem.
Any problem, contact me.

is this possible a burnt sim？ it happen on my brothers iphone 4s . it burnted 2 sims in 1 week
Click to expand...
Click to collapse
the APN are not needed for calls. just to surf the Internet
Correct me if I'm wrong.
what you say. I think the SIM is burned. try a new and tell us how it goes
Sometimes the server of my operator falls and I can not make calls or messages.for about 5 minutes. or up to 6 hours
Click to expand...
Click to collapse
The sim is OK, because works on other cell, i tried 2 different operators sim, and internet not work, only wifi.
I would try a total reset first GTG's Ultimate Unbrick http://forum.xda-developers.com/show....php?t=1116251
If you're interested I can host that file. If that is OK with the Author that is
Click to expand...
Click to collapse
Rally1969, when i installed ZEUS rom and saw the problem stayed, i use GTG's Ultimate Unbrick and still not working after stock rom installed
any possibility of the IMEI is blocked?
markbyck, i sent a message for you.

if you are blocked by imei then you should be able to get incomming calls, but when every you try making an outgoing call you signal will jump to no service, ( i bought a stolen phone before ) F**KING craiglist

guys, i installed DarkyRom and show 'Sim card PUK-Locked' any idea?

puk blocked means you need a new sim card
Sent from my SAMSUNG-SGH-I997 using XDA App

[Q] Chinese Opo Will not work on any carrier :(

Hey Guys purchase the 16GB oneplus one from china, I use 3g Tmobile, and tryed vodaphone also but Can not get any signal!
Going to the network it comes up with EE,EE, Vodaphone, 3 Ect, I click on them and all of them say 'your sim card does not allow a connection to this network' really frustrating, tried entering apns manually but as soon as i save it dissapears, tryed everything, resetting, reflashing 11s, Other people have bougth the chinese one and works fine in the uk, mine will not budge!
Also tried new sims cards ect, please help me save my paperweight

Whelan189 said:
Hey Guys purchase the 16GB oneplus one from china, I use 3g Tmobile, and tryed vodaphone also but Can not get any signal!
Going to the network it comes up with EE,EE, Vodaphone, 3 Ect, I click on them and all of them say 'your sim card does not allow a connection to this network' really frustrating, tried entering apns manually but as soon as i save it dissapears, tryed everything, resetting, reflashing 11s, Other people have bougth the chinese one and works fine in the uk, mine will not budge!
Also tried new sims cards ect, please help me save my paperweight
Click to expand...
Click to collapse
Which is why you shouldn't purchase a non compatible phone, for use in another area?

This is why you shouldn't buy this phone from the scalpers. The chinese version does not support many of the worldwide bands that the "global" version of the phone does. My advice would be to try to sell it to someone who can use it and sign up on the OnePlus forums and wait for an invite for the CM version which supports the bands you need.

Get a new sim, sounds like an old sim that doesn't have the updated CellID info in it.
I had to change my 3 sim when I had my SGS4 as it wouldn't register because it was too old.
Sent from Uranus via OnePlus

Whelan189 said:
'your sim card does not allow a connection to this network' really frustrating, tried entering apns manually but as soon as i save it dissapears, tryed everything, resetting, reflashing 11s
Click to expand...
Click to collapse
I had that happen to me on the interational one and felt quite dumb afterwards...
Make sure the SIM card tray is rotated DOWN so that the contacts on the sim card look to the back of the phone.
It will fit both ways (imho a very strange design choice) but with a tiny little space left when rotated the wrong way.
In other words: turn the phone on it's screen before inserting the sim card facing you.
I have _NO_ clue why the phone thinks it has a SIM card when obviously it cannot access it...

d4fseeker said:
I had that happen to me on the interational one and felt quite dumb afterwards...
Make sure the SIM card tray is rotated DOWN so that the contacts on the sim card look to the back of the phone.
It will fit both ways (imho a very strange design choice) but with a tiny little space left when rotated the wrong way.
In other words: turn the phone on it's screen before inserting the sim card facing you.
I have _NO_ clue why the phone thinks it has a SIM card when obviously it cannot access it...
Click to expand...
Click to collapse
OMG
I LOVE YOU MAN
i tried everything:L how silly is the design, i though i was going to hve to make a loss hhaha cba to send back to china thanks so much
this is why xda is the best thread

3G not working on Nexus 5

I've been using my 3G mobile connection for quite a while now.
Well, WAS using, someday, it suddenly stopped working. I thought it was because I exceeded my 250mb limit but, unfortunately, it wasn't that.
It usually showed up 'H' and had a fairly nice download speed, but now it only shows E and has a tremendously bad download speed.
So, after figuring out it wasn't my plan having its limit exceeded, I decided to try somethings to fix it. At the time I was using the most recent CM11 nightly.
I did a wipe and installed the latest snapshot. Didn't work.
I tried configuring the APN, exactly like my parent's Moto G, and had no luck.
And then now, as a last resort, did a COMPLETE wipe(including internal storage), and flashed the latest Android L ROM available.
Nothing worked, at all, actually.
I've also tried inserting my SIM card to my mother's Lumia 720. It worked as it should. Showed up 'H'. Her functioning SIM card also didn't work on my cellphone.
I'm getting desperate.
I live in Brazil, and my mobile operator is "Oi"

call your operator. you are getting edge, "E". thats very slow data speeds! also, look in tbe main settings, mobile networks. what is it set for.. lte, 3G, or 2G?

simms22 said:
call your operator. you are getting edge, "E". thats very slow data speeds! also, look in tbe main settings, mobile networks. what is it set for.. lte, 3G, or 2G?
Click to expand...
Click to collapse
As I said, the SIM card works properly on another cellphone, and other SIM cards don't work on mine. The network is set for 4G.
The problem is on the cellphone, that's for sure. I ran out of ideas so I decided to post here.

otaviomad said:
As I said, the SIM card works properly on another cellphone, and other SIM cards don't work on mine. The network is set for 4G.
The problem is on the cellphone, that's for sure. I ran out of ideas so I decided to post here.
Click to expand...
Click to collapse
try this.. dial *#*#4636#*#*, then press phone info, then change the lte/gsm to wcdma preferred. this will prefer 3G(not lte). btw, have you tried calling your operator? it can just be how they have you set up in their system now.

simms22 said:
try this.. dial *#*#4636#*#*, then press phone info, then change the lte/gsm to wcdma preferred. this will prefer 3G(not lte). btw, have you tried calling your operator? it can just be how they have you set up in their system now.
Click to expand...
Click to collapse
I did call my operator, but they told me to try the SIM card on another phone to see if it works and it worked. They didn't have anything to do.
Also, I've tried configuring that, still shows E. If I choose "Only WCDMA", my network goes unavailable.

otaviomad said:
I did call my operator, but they told me to try the SIM card on another phone to see if it works and it worked. They didn't have anything to do.
Click to expand...
Click to collapse
did you try the *#*#4636#*#*?
if its fine with the other sim card, then its not your phone. you might need a new sim card.

simms22 said:
did you try the *#*#4636#*#*?
if its fine with the other sim card, then its not your phone. you might need a new sim card.
Click to expand...
Click to collapse
I tried the SIM card on ANOTHER phone, the one I'm using on my phone, on another one. It worked.

otaviomad said:
I tried the SIM card on ANOTHER phone, the one I'm using on my phone, on another one. It worked.
Click to expand...
Click to collapse
dont know what to tell you, honestly. you tried another sim card in your phone, and it works. you tried your sim card in another phone, and it works. but your sim card doesnt work properly in your phone.. it should be working in your phone as well then, unless you do not have a 3G signal around you. personally, id just ask them for a new sim card, just in case.

simms22 said:
dont know what to tell you, honestly. you tried another sim card in your phone, and it works. you tried your sim card in another phone, and it works. but your sim card doesnt work properly in your phone.. it should be working in your phone as well then, unless you do not have a 3G signal around you. personally, id just ask them for a new sim card, just in case.
Click to expand...
Click to collapse
No no, I tried another SIM card on my phone and it didn't work. It's all about the phone, not the sim card.

otaviomad said:
No no, I tried another SIM card on my phone and it didn't work. It's all about the phone, not the sim card.
Click to expand...
Click to collapse
oh, ok. the sim reader could have broken(somehow). thats actually a fairly common issue. can you get an exchange? where did you buy yours?

simms22 said:
oh, ok. the sim reader could have broken(somehow). thats actually a fairly common issue. can you get an exchange? where did you buy yours?
Click to expand...
Click to collapse
I bought it from the internet. I don't think I can get an exchange.

UPDATE:
I've figured out the problem. It's the signal. When the H signal isn't strong enough, it goes to E. I was on another place on my city today and there H was working, and exactly when I got back, the signal started being EDGE.
Now, I've tried flashing another radio. I just downloaded the ZIP and flashed. Note that I am on Android L. It still has the same problem. Now I ask, how may I fix this?

No SIM card error, help

Woke up the other day and my AT&T s6 randomly got this issue. I am using my cricket sim card on this smg900a. Tried another cricket sim and it also did not work. It is not my sim either as im currently using it on another phone. Also does not appear to be a hardware issue as it detects when i insert or remove the sim. Just says No SIM, Emergency calls only. Please help anybody.

Perhaps some faulty SIM cards? Try one from another operator. Also AT&T phones usely works only with AT&T SIM cards if I'm correct.

mrjraider said:
Perhaps some faulty SIM cards? Try one from another operator. Also AT&T phones usely works only with AT&T SIM cards if I'm correct.
Click to expand...
Click to collapse
Cricket is an at&t sub carrier. All at&t phones work on cricket actually, ive been using at&t phones on their service for quite a while now.

Try to contact the carrier and see what they suggest.

Revilo-Relgnihs said:
Try to contact the carrier and see what they suggest.
Click to expand...
Click to collapse
Well all they tried was put in a new sim card which did not work.. said it was the phone. But i believe it might be software related.

Israelsalinas19 said:
Woke up the other day and my AT&T s6 randomly got this issue. I am using my cricket sim card on this smg900a. Tried another cricket sim and it also did not work. It is not my sim either as im currently using it on another phone. Also does not appear to be a hardware issue as it detects when i insert or remove the sim. Just says No SIM, Emergency calls only. Please help anybody.
Click to expand...
Click to collapse
I can see several more people have same issue, including myself, but I tampered service mode and EFS folder, so I guess there could be a problem.
Unfortunately dont have original EFS folder backup, or warranty, as I am not the first owner of the phone.
My post:
http://forum.xda-developers.com/galaxy-s6/help/g920f-network-issues-t3291903#post64814110
Hope someone find solution to this quickly.

brenner650 said:
I can see several more people have same issue, including myself, but I tampered service mode and EFS folder, so I guess there could be a problem.
Unfortunately dont have original EFS folder backup, or warranty, as I am not the first owner of the phone.
My post:
http://forum.xda-developers.com/galaxy-s6/help/g920f-network-issues-t3291903#post64814110
Hope someone find solution to this quickly.
Click to expand...
Click to collapse
Yep i gotta use a cheap phone meanwhile -.- this sucks.