i9505 unknown baseband hw problem - GSM-Forum

Mattia_sp · 07-25-2014, 13:58

hi friend, my i9505 after a series of flash with odin and custom rom go in soft brick, (strangely warming), and then after the flash to 4.4.2 official works but the phone part no .. Unknown baseband, no imei, everything else works.. I tried with octopus box, but it gives error and can not restore efs or write other.. Downgrade is impossible with new bootloader.. and I've tryed several fw modem..
I think it's a hardware problem.. there is a solution? or I have to change baseband ic? What do you recommend? and thanks all ..

Gsm Narendra · 07-25-2014, 14:20

First downgrade by spt firmware after reset efs , your problem solved ... Contact gsm narendra ..

Mattia_sp · 07-25-2014, 16:46

I haven't spt.. I have octopus box.. But I can't downgrade with new bootloader..

lasertec_06 · 07-25-2014, 17:12

Flash it with back stock firmware all ok flash it with orignal firmware Bro

Mattia_sp · 07-25-2014, 20:09

Quote:

Originally Posted by lasertec_06

Flash it with back stock firmware all ok flash it with orignal firmware Bro

obviously I've tried so many times to put the original fw and try to flash .. but all in vain.. The problem is serious.. Not solvable with odin and stock firmware..

Mattia_sp · 07-26-2014, 15:30

I've tried with many several modem but same situation.. Can anyone tell me what I do or what I must replace? Thanks..

Mattia_sp · 07-28-2014, 10:05

What must I do?? Can anyone give me an image of a correct efs partition?

laptopmd · 07-30-2014, 20:48

Your situation looks like an HW issue, as i had many times on I9505.

My solution that worked, was to rehot the modem Chip, because after being dropped this chip will loose. Modem chip is U501, be careful because it is near UCP600 and if you damage this one by too much heat, your phone will not work anymore.

07-25-2014, 13:58	#1 (permalink)
Mattia_sp Freak Poster Join Date: Oct 2013 Location: Italia Posts: 223 Member: 2044491 Status: Offline Thanks Meter: 18	i9505 unknown baseband hw problem hi friend, my i9505 after a series of flash with odin and custom rom go in soft brick, (strangely warming), and then after the flash to 4.4.2 official works but the phone part no .. Unknown baseband, no imei, everything else works.. I tried with octopus box, but it gives error and can not restore efs or write other.. Downgrade is impossible with new bootloader.. and I've tryed several fw modem.. I think it's a hardware problem.. there is a solution? or I have to change baseband ic? What do you recommend? and thanks all ..

07-25-2014, 14:20	#2 (permalink)
Gsm Narendra Freak Poster Join Date: Jun 2012 Location: India Pune Posts: 422 Member: 1778852 Status: Offline Sonork: 100.1641316 Thanks Meter: 231	First downgrade by spt firmware after reset efs , your problem solved ... Contact gsm narendra ..

07-25-2014, 16:46	#3 (permalink)
Mattia_sp Freak Poster Join Date: Oct 2013 Location: Italia Posts: 223 Member: 2044491 Status: Offline Thanks Meter: 18	I haven't spt.. I have octopus box.. But I can't downgrade with new bootloader..

07-25-2014, 17:12	#4 (permalink)
lasertec_06 No Life Poster Join Date: May 2009 Age: 49 Posts: 801 Member: 1027729 Status: Offline Thanks Meter: 97	Flash it with back stock firmware all ok flash it with orignal firmware Bro

07-26-2014, 15:30	#6 (permalink)
Mattia_sp Freak Poster Join Date: Oct 2013 Location: Italia Posts: 223 Member: 2044491 Status: Offline Thanks Meter: 18	I've tried with many several modem but same situation.. Can anyone tell me what I do or what I must replace? Thanks..

07-28-2014, 10:05	#7 (permalink)
Mattia_sp Freak Poster Join Date: Oct 2013 Location: Italia Posts: 223 Member: 2044491 Status: Offline Thanks Meter: 18	What must I do?? Can anyone give me an image of a correct efs partition?

07-30-2014, 20:48	#8 (permalink)
laptopmd Freak Poster Join Date: Jan 2013 Location: Switzerland Age: 48 Posts: 408 Member: 1873863 Status: Offline Thanks Meter: 67	Your situation looks like an HW issue, as i had many times on I9505. My solution that worked, was to rehot the modem Chip, because after being dropped this chip will loose. Modem chip is U501, be careful because it is near UCP600 and if you damage this one by too much heat, your phone will not work anymore.