am facing the same prob on my iphone 4.
Version: 5.0.1 (9A405)
using digi but it says no service. i put moms maxis sim card, can detect sim lock but cannot connect to carrier. any solution?? Does the bracket part at the version cause the no service issue?


Why is there few types of firmware??? 5.0.1 (4 GSM) and 5.0.1 (4 CDMA)???

This post has been edited by kenn91: Jan 8 2012, 09:23 PM

happened just now, no service. then cannot sent msg or call. demn !

Upgrade to Version: 5.0.1 (9A406), should solve the problem.

happen to me also..carrier problem..damm it.
Version: 5.0.1 (9A405)

This post has been edited by chomeng: Jan 15 2012, 03:06 PM

yours is GSM. not CDMA.

im using maxis, i also face the problem once in a while. but i think mine is just because of poor signal

now using ios 5.0.1

Damn it, now my turn.

My IP4S Version: 5.0.1 (9A405) No Sim, waiting restore to (9A406) Digi


This post has been edited by ahSiang: Jan 15 2012, 11:51 PM

Hello All,
Would like to share my experience with you guys.
I am iP4 user. My 1st phone upgraded to iOS5 without any problem (signal), but my home button faulty, so I claimed warranty, so I got another refurbished unit, then my problem starts...
Sometimes my phone signal only 1 bar and NO carrier logo. Anyone call me, it won't show in my phone, but I can call out. Every 3 or 4 days, I have to "Reset All Settings" then my phone will become normal. I read in this forum and got to know is firmware issue, so I ignore and wait for the update.
Again, this refurbished phone gave me home button issue, i claimed another refurbished unit, surprisingly, been using for 2 weeks now and no such issue. (*touch wood)

FYI, 3 phones are same carrier setting(Maxis 11.1), iOS 5.0.1(9A405), Hotlink user

So now my question is... really firmware issue ka? or hardware issue ler?

This post has been edited by maychia: Jan 16 2012, 12:55 PM

i also don know what happe nwith this issue,
i try restore last nite with itunes but fail, and the weired thing is was detect back to Digi 3G. and the phone still stick with iOS 5.0.1(9A405)

Hello peeps,

Model: Iphone 4 (Maxis set)
iOS: 5.0.1 (Jailbroken)
Date of Purchase: Dec 10
Telco: Maxis prepaid

I believe this is firmware issue. Not related to hardware. I've no issue before upgrading to iOS 5 months ago and all the while jailbroken

The best way to rectify this issue is by turning your carrier mode into manual.

Go to settings -> carrier -> turn off automatic and manually search for ur network.

PS: I'm a victim of restoring (iOS) for the past 1 month until i made changes to that setting and it solved 99% of my headache.

This post has been edited by kokmunrulez: Jan 16 2012, 06:57 PM

I solved my issue. When i replaced my lcd they didnt install the sim tray properly causing poor detection towards the simcard. he simply fixed it by reassembling it.

hey guys, i'm facing the same problem as all of u.. cant make calls/sms nor receive calls/sms although my damn signal bar is full.. basically, i restored my iphone more than 10 times each time this problem occurs.. so far, i've tried many things to get this problem fixed.. any how, so far my iphone is running pretty well for 4 days now since my last restore..this is what u guys can try, no promising that it can fix the problem, maybe the problem might occur again, but so far mine is running well:)

1. update ur itunes with the lastest version, and what ever needed to be updated in ur itunes.
2. in ur iphone, go to setting > general > date/time > turn off "set automatically > then set the time zone manually according to ur area.
3. go to general > reset > reset all network
4. reboot ur iphone
5. and now, restore ur iphone with the itunes which u just updated. update any carrier settings if there is a notice pop up.

pls update here if this steps works for u all.. anyhow, i just share what i tried and so far so good:) lets pray that it works for all:)

i update to 9a406 but still very weak signal or no service,mine is 4s digi set

enmund.. i dont think your's is same problem as your signal is full

arafat : its the same problem:) at first its no servise/searching for signal, then after on/off and turn on/off airplane mode, it shows signal but cant make/receive calls and sms:) i've read through everyone's comment here, and some is facing this same problem, so its just a try out for u guys:) it may or may not work, but no harm trying:)

Let me share my solution to the carrier signal problems.
1)update itunes with the lastest version
2)in itunes, restore your iPhone to its original settings by clicking restore
3)towards the end of restoration, itunes will ask you whether to restore from backup or clean install?
Note:the trick is to go for "Clean Install", do not install from backup.
4)Once installed(iPhone original settings), you can then proceed to restore from backup.

Carrier signal problems solved!Period!

Guys. hope this helps!!

edmund & xperia,

did u check ur firmware version before and after you did your method?

i think u upgraded from 9a405 to 9a406 right?

Mine was running Version: 5.0.1 (9A405) upgraded from ios4.3.3

The gist of this solution is you should install fresh copy of ios5.0.1 & to factory setting. NEVER NEVER install to backup copy in your 1st run.

Once your iphone runs in brand new fresh copy of ios5.0.1, you can then proceed to installing your apps, contacts etc by clicking restore from backup. Definitely you will not encounter the Carrier signal problems again!

Not true. I try and it recurs.

Same here. Clean 9A406 still the problem is there in 4s..

Same problem. iPhone 4S 5.0.1 (9A406) unable to pick up reception while on "No Service" status.