Modem possibly dead (SPH-L720) - GSM-Forum

zunzara22 · 06-22-2017, 23:31

Not really sure when it happened (probably while I was playing around with different custom roms) but my phone managed to lose all private data as well as the ability to "see" what's installed on it.
I can't see my Baseband, Hardware or Software version, IMEI and even MSL is not working.
I can't perform ##RTN# or ##SCRTN# and the Service Mode is empty.
I had my phone internationally unlocked, everything worked fine but now the system doesn't see the SIM card at all. It doesn't even report it as "Wrong SIM card" it just doesn't register it.
I've flashed a stock rom *NAE* and upgraded it (without a problem) trough OTA all the way to GPL1 (NAE-NG2-OD2-OH1-OK3-PI2-PL2) - six updates, problem stays the same. All the time I have the system as "Samsung Official", no suggestions what might be wrong.
I do have a backup of the efs partition as well as m9kefs1-3 but restoring them didn't change anything.
Whatever it is, seems like the modem is dead (or there's no way to communicate with him).
I thought that AT commands might do but I can't reach it from the computer either. Tried DM+MODEM+ADB, RNIDS+DM+MODEM but it doesn't give me any reply. It is recognized in the Device Manager, but when I go to Properties\Diagnostics and then "Query Modem" I get - "The modem failed to respond".
I've tried changing UART between PDA and CDMA (AP/CP) but there's no difference.
I'm out of ideas so I'm asking for advice.
Thx!

zunzara22 · 06-29-2017, 21:38

More than 100 views and still no comments?

06-22-2017, 23:31	#1 (permalink)
zunzara22 Junior Member Join Date: Sep 2016 Posts: 4 Member: 2630961 Status: Offline Thanks Meter: 0	Modem possibly dead (SPH-L720) Not really sure when it happened (probably while I was playing around with different custom roms) but my phone managed to lose all private data as well as the ability to "see" what's installed on it. I can't see my Baseband, Hardware or Software version, IMEI and even MSL is not working. I can't perform ##RTN# or ##SCRTN# and the Service Mode is empty. I had my phone internationally unlocked, everything worked fine but now the system doesn't see the SIM card at all. It doesn't even report it as "Wrong SIM card" it just doesn't register it. I've flashed a stock rom NAE and upgraded it (without a problem) trough OTA all the way to GPL1 (NAE-NG2-OD2-OH1-OK3-PI2-PL2) - six updates, problem stays the same. All the time I have the system as "Samsung Official", no suggestions what might be wrong. I do have a backup of the efs partition as well as m9kefs1-3 but restoring them didn't change anything. Whatever it is, seems like the modem is dead (or there's no way to communicate with him). I thought that AT commands might do but I can't reach it from the computer either. Tried DM+MODEM+ADB, RNIDS+DM+MODEM but it doesn't give me any reply. It is recognized in the Device Manager, but when I go to Properties\Diagnostics and then "Query Modem" I get - "The modem failed to respond". I've tried changing UART between PDA and CDMA (AP/CP) but there's no difference. I'm out of ideas so I'm asking for advice. Thx!

06-29-2017, 21:38	#2 (permalink)
zunzara22 Junior Member Join Date: Sep 2016 Posts: 4 Member: 2630961 Status: Offline Thanks Meter: 0	More than 100 views and still no comments?