my iphone 4 have signal but won't make/received call and text

After you restore it, are you bringing your content back by a backup? If so, what kind of backup-iCloud or iTunes

I am using Iphone 4S since 5th Jan 2012 ago & I got the same problem with u even I updated my firmware to IOS 5.0.1.

I can't end my call and it keeps on hanging at "call ending" status & can't go thru into "call ended" status. Especially quite frequent happen when I switched on my Iphone in the morning & made my first call!! Hence, I can't make the phone call after this.

When the above issue happened, I tried to use other mobile phone to call & sms my Iphone & It is ringing but my Iphone does not detect any incoming call & also not receive sms even the sms is successfully delivered. It is randomly happened.

But I don't notice any "no service" with my iphone signal. My reception is ok all the while.

I suspect that both the IOS 5 & even updated IOS 5.0.1 have bugs because u mentioned that before u updated to latest version (i think should be IOS 5.0.1, right?!) your iphone 4 was working perfectly well. Somemore, I found out from other Communities Discussion that the IOS 5.1 beta 3 has fixed their iphone 4s "outgoing call no audio" issue so far. Thus, we should hope that coming IOS 5.1 will fix this ridiculous issue as soon as possible.

I was also advised by the Apple Technician that try "reset all setting" or do the firmware restoration to determine whether is software issue or not. If still happen, then try to replace a new micro sim card. If still happen again, then we should surrender & it seems to be the hardware issue & should claim for hardware warranty to replace a new Iphone 4s.

Anyway, I suggest we should wait for IOS 5.1 officially lauching to check whether can solve our issue or not because we are not using the same model of Iphone but facing same prob with IOS 5.0.1 & by right, your Iphone 4 should not have hardware or the micro sim card issues so far.

Did u use bluetooth headset & what bluetooth version u are using? Because at first, I suspect my old bluetooth headsets with version 1.0 & 2.0 (either bluetooth software / hardware) cause these problems. So I bought a new Jabra with Bluetooth version 2.1, but still happen.

Hence, I suspect if this is hardware issue then maybe due to signal / reception hardware device problem or bluetooth hardware device or wifi hardware device problems. Or maybe also bugs from particular downloaded apps!!

Anyway, my suggestion to u is u try to uninstall your itunes with ur IOS 5.0.1 completely & download again the itunes & IOS 5 without enable any virus scanner, windows firewall & defender. After downloaded, u should use iphone recovery mode & do the firmware restoration. Of course u need to backup before proceed with firmware restoration.

Is better if u got another laptop & just download the new itunes & IOS 5 & remember to disable ur virus scanner, windows firewall & defender in the process of download & install them.

hope I can help u a little bit & we hope together that Apple Team can identify the real problem & solve these issues as soon as possible & don't just let us try this & that method & wasting our golden time as we spent a lot of money on Iphone is not let us sufferred but should let us enjoy using it completely!!

Hi Katie, after I restored my firmware, I brought back all my contents by "restore from backup" & it was from my iTunes's backup instead of iCloud. Any diff or solution with that?

Thank you!!

itunes back ups store the software with the data. so you have vitually restored the device to take off the corrupted software and then brought on new with the restore and then placed the bad software back on the device again with the itunes back up. you are going to want to sync all content to the computer or store into icloud (icloud only stores data, not the software) then do another restore and restore from icloud or setup as new device after the restore and sync the content back to the phone and see if you still have the same issue

Katie, Tq with ur advice. I will try on it. Anyway, are u facing the same problem with us previously? U use Iphone 4 or 4s with IOS 5.0.1? Did u try IOS 5.1 beta 3? In your opinion, is due to software or hardware or micro simcard problem? Or due to bluetooth, wifi, apps & etc problems? Thank you!!

Have you tried to remove the firmware and restore the device?

http://support.apple.com/kb/TS1813 you want to skip step 2. Place your phone into DFU Mode and then restore again and see if you're still having same issue. If so, it needs a repair/replacement.

Firmware is a combination of hardware & software. When you do a simple restore, it doesn't take off the firmware-just updates. It's like putting more icing on a decaying cake lol

By doing this, you will bring on new software as well as new firmware

It doesn't mess up the phone, it just gives it new firmware.

The article I gave above walks you through how to remove the firmware file. You just need to skip step 2 in the article.

After you follow the article, you want to place it into DFU Mode, just follow: http://www.iclarified.com/entry/index.php?enid=1034

Do you not have family or friends from the country you got it from to have it serviced?

Do you have a valid SIM in the device? Have you called your carrier?

It stands for Device Firmware Update. You have to remove the firmware as in the first article first then place it into DFU Mode and allow it to restore.