iPhone loosing signal

[samantha]

My friend asked me to fix his iPhone which is constantly loosing signal of the provider. Usually it shows full signal and then it dissapears and it says "No service". And after a few seconds it will show full signal again. He is runnig 1.0.2 firmware. It does that with SIM cards of different providers, we tried T-Mobile, Vodafone and O2. I tried to restore the phone, didnīt help, so I reflashed the baseband and also with no succes. Wi-fi and everything else works fine...
Any idea what to do with this?

Thanks, samantha

[fat x nub]

hmmmm....wat did u unlock with?

[samantha]

First he unlocked ut thru iBrickr or whatever Windows stuff is and then after he gave it to me and I restored it - I actevated it with iNdependence and unlocked it with iUnlock...

[toyvan]

In my experience the dreaded 'NO SERVICE' signal is a common problem to all iPhones, not just modded ones. Before I even hacked into mine I was having the same issue as I am now..a new sim card might solve it, but for now I just think it is a network problem...cheers!

[italianapple]

I'm having the same problem.. I bought a 1.1.1 iphone from the apple store took it home act and unlocked through jailbreakme.com and anysim 1.1 and the phone worked beautifully for 3 days then last night the signal started dropping from 5 to 1 to 4 bars to no service. it just keeps doing this over and over. any solutions to fix this. please help 'm losing my mind.

thanks

bump
anyone?

[pleyah69bjay]

when i was on 1.0.2 id never see no service logo til upgraded to 1.1.1 somtyms full service al of a sudden no service frm my experience i dnt think its frm jailbreaking or unlockin my bros phone is not jailbreak or unlock and it does the same i gues its phone itself.

[theone77]

can anyone share the cause and solution of this problem? my wife accidentally use the anysim1.1.1 in my 1.0.2firmware. So i lose my signal then i tried to install and use anysim1.0.2 and now it works. but normally my phone will loose a signal in the middle of my conversation. No service and my call ends. Then it will be like that in most of my call. LOSSING SIGNAL

dead thread

[italianapple]

I hear you I'm having the same issue but no one seems to know whats going on.

[samantha]

Seems most of the people having problems with this are on 1.1.1. But my friendīs phone is 1.0.2 and it does the same... But what Iīve read so far, some people didnīt see it until they upgraded to 1.1.1. I am going to unlock some brand new 1.1.1 phones but I am thinking about downgrading them to 1.0.2 which seems more "stable".. .
Btw - do you guys have experince with anySIM 1.1? I used the old version twice on 1.0.2 and never worked.. It said "Unlock succesful", but SIM still didnīt work. Now Iīve read that some people have the same problem with 1.1 version. Donīt you know how to make it work? SIM without PIN, chmod to 775.. I tried both and didnīt work.. anything else?

[abhishekkhurana]

I read some where to select Settings->General->Reset->Reset All Settings. Maybe that helps? For now, I'm sticking to my modded unlocked 1.0.2. Dreading "No Service" if I virginise and upgrade

[gamezz]

try john tool app by erica sadun..google it

[samantha]

I tried it already. Didn´t help and after I run it I lost all icons and I could´t use phone at all. Had to restore it again...

[cc5ak]

I have had this problem for weeks, and finally worked out what is causing it. It's the Iphone's power management settings, and kicks in every few minutes of non activity.

What I did was SSH to /System/Library/SystemConfiguration/PowerManagement.bundle and renamed the 2 files to this:

'com.apple.SystemPowerProfileDefaults.plist2'

'PowerManagement1'

Rebooted the phone, and it everything working perfectly. No more loss of signal etc. Battery life doesn't seem to be affected that badly.

I am using firmware 1.1.2 , unlocked with IPSF.

[theone77]

I have had this problem for weeks, and finally worked out what is causing it. It's the Iphone's power management settings, and kicks in every few minutes of non activity.

What I did was SSH to /System/Library/SystemConfiguration/PowerManagement.bundle and renamed the 2 files to this:

'com.apple.SystemPowerProfileDefaults.plist2'

'PowerManagement1'

Rebooted the phone, and it everything working perfectly. No more loss of signal etc. Battery life doesn't seem to be affected that badly.

I am using firmware 1.1.2 , unlocked with IPSF.

can anyone confirm this to be safe? working?

[samantha]

Unfortunately doesnīt work for me

[frank1123]

Any updates on this? I too am experience this problem and I tried JohnTool and it didn't help

[somebodyhere]

is this happening only when inside a building?

[frank1123]

this is happening inside and out. Seems like theres only a handful of people with this problem so I'll try my luck and exchanging my phone for another one, hopefully they'll have more 1.1.1 fw's in stock somewhere...

[frank1123]

..double post

[cc5ak]

can anyone confirm this to be safe? working?

I've made the same changes to the 2 files on 3 other iPhones running firmware 1.1.1 and 1.1.2 and it worked on all of them. You can verify this is working by going into the Settings, Usage and your usage time and standby time should be the same regardless.

Also went as fas as deleting the 2 files and still works.