Iphone4 no modem firmware inside - GSM-Forum

azeem781986 · 01-08-2013, 20:38

hi. I have iphone 4 locked to 3UK,
I want to place factory unlock but phone is on searching with no modem firmware in settings>general>about.
Wifi> OK
Bluetooth> OK
Imei> OK
Modem Firmware> BLANK

not show imei with *#06#
when i try to restore with itunes
ERROR 21

Should i request factory unlock for 3uk or how i can restore it without custom firmware.??
thnx

mobileboothuk · 01-08-2013, 21:03

hi mate its hardware problem do not place it for unlocking

firefox2011 · 01-09-2013, 05:42

Error 21 measn your not in DFU mode.

To resolve the iTunes Error 21 in order to restore your iPhone/iPod touch, connect to your device into DFU mode first to get by following the instructions according to your device, The steps below will help getting into DFU mode in case you do not know how to:

Connect your device to your PC or Mac via a USB cable and launch iTunes.
Hold Home + Power button for 10 seconds.
After 10 seconds release the power button off, but keep the Home button pressed until iTunes a little device in recovery mode you find there.
Once your device into DFU mode, you see nothing on the screen, only a black image.

Modem Firmware> BLANK
its a hardware Problem maybe Baseband Chip

mooreallty · 01-09-2013, 08:20

yeah,10 seconds release the power button off, but keep the Home button pressed until iTunes a little device in recovery mode you find there

01-08-2013, 20:38	#1 (permalink)
azeem781986 No Life Poster Join Date: May 2007 Location: InsidE AndroiD Age: 37 Posts: 1,906 Member: 503161 Status: Offline Sonork: 100.1584069 Thanks Meter: 473	Iphone4 no modem firmware inside hi. I have iphone 4 locked to 3UK, I want to place factory unlock but phone is on searching with no modem firmware in settings>general>about. Wifi> OK Bluetooth> OK Imei> OK Modem Firmware> BLANK not show imei with *#06# when i try to restore with itunes ERROR 21 Should i request factory unlock for 3uk or how i can restore it without custom firmware.?? thnx

01-08-2013, 21:03	#2 (permalink)
mobileboothuk No Life Poster Join Date: Feb 2011 Location: United Kingdome Posts: 814 Member: 1507640 Status: Offline Thanks Meter: 131	hi mate its hardware problem do not place it for unlocking

01-09-2013, 05:42	#3 (permalink)
firefox2011 Freak Poster Join Date: May 2011 Location: Spain Posts: 175 Member: 1587826 Status: Offline Thanks Meter: 56	Error 21 measn your not in DFU mode. To resolve the iTunes Error 21 in order to restore your iPhone/iPod touch, connect to your device into DFU mode first to get by following the instructions according to your device, The steps below will help getting into DFU mode in case you do not know how to: Connect your device to your PC or Mac via a USB cable and launch iTunes. Hold Home + Power button for 10 seconds. After 10 seconds release the power button off, but keep the Home button pressed until iTunes a little device in recovery mode you find there. Once your device into DFU mode, you see nothing on the screen, only a black image. Modem Firmware> BLANK its a hardware Problem maybe Baseband Chip

01-09-2013, 08:20	#4 (permalink)
mooreallty Junior Member Join Date: Jan 2013 Posts: 3 Member: 1865248 Status: Offline Sonork: 94505 Thanks Meter: 1	yeah,10 seconds release the power button off, but keep the Home button pressed until iTunes a little device in recovery mode you find there