[Please help] (Unisoc / Spreadtrum) Sc7731c Modem for Latin America.
[Please help] (Unisoc / Spreadtrum) Sc7731c Modem for Latin America.
(12-03-2018, 04:04 AM)Super_seb1 Hi
I have a Blu Advance 4.0M A090L with a SPD sc7731c proccesor. running Marsmallow 6.0. i'ts Dual SIM.
The last 3 weeks i've been having several troubles with the phone, but certainly the most annoying and imposible issue to fix was this:
...
(12-03-2018, 11:33 AM)hovatek(12-03-2018, 04:04 AM)Super_seb1 Hi
I have a Blu Advance 4.0M A090L with a SPD sc7731c proccesor. running Marsmallow 6.0. i'ts Dual SIM.
The last 3 weeks i've been having several troubles with the phone, but certainly the most annoying and imposible issue to fix was this:
...
At this point, you'll need to find a compatible rom since you've already flashed off the original rom. I'd encountered both issues you've mentioned in your post while porting a personal custom rom (standby more and no signal) and flashing the right pac file fixed those for me.
(12-03-2018, 08:27 PM)Super_seb1 I understand that flashing a compatible rom will fix these issues, but that's the problem. there is no compatible rom with this phone, for there are not american costumers of this phone, so there isnt development of it. i searched for the stock rom and i couldn't find it. That's why i requested the latin Modem
(13-03-2018, 11:07 AM)hovatek(12-03-2018, 08:27 PM)Super_seb1 I understand that flashing a compatible rom will fix these issues, but that's the problem. there is no compatible rom with this phone, for there are not american costumers of this phone, so there isnt development of it. i searched for the stock rom and i couldn't find it. That's why i requested the latin Modem
Ran a quick search for the Blu Advance 4.0M A090L pac file but nothing solid came up.
(13-03-2018, 09:42 PM)Super_seb1 it's useless then try to fix it by myself? im trying to find a compatible modem right now in order to recover signal, the standby issue i guess i can fix it by modifying files at /sys/power (i've root the phone with magisk 16.0)
(14-03-2018, 09:45 AM)hovatek(13-03-2018, 09:42 PM)Super_seb1 it's useless then try to fix it by myself? im trying to find a compatible modem right now in order to recover signal, the standby issue i guess i can fix it by modifying files at /sys/power (i've root the phone with magisk 16.0)
You're assuming that the problem is from the modem. I had this same issue on a flashable zip I was working on for an SPD device of mine. each time I flashed the zip, I lost network signal. Turned our the problems was from /system
Lets take a look at the modem for a moment. Access the Engineer mode and check what bands are available
For the power issue, I believe your goal is wake lock idle?
(14-03-2018, 10:59 PM)Super_seb1 i went to engineer mode and check the available bands, and this is what i found:
Automatic,EURO Band, USA Band, JAPAN Band,AUS Band,AUS2 Band
note that i live in latin america, so neither of these could work on the phone. by the way, when i try to select one of those, returns error, incorrect. (in all the bands)
concerning to the standby issue, yes, i guess.
(15-03-2018, 12:00 PM)hovatekSo i have to check all sc7731c phone firmware for my region until find the right modem?(14-03-2018, 10:59 PM)Super_seb1 i went to engineer mode and check the available bands, and this is what i found:
Automatic,EURO Band, USA Band, JAPAN Band,AUS Band,AUS2 Band
note that i live in latin america, so neither of these could work on the phone. by the way, when i try to select one of those, returns error, incorrect. (in all the bands)
concerning to the standby issue, yes, i guess.
Seems you'll need the modem from a phone made for your region. If you wish to modify this modem then prepare to do a lot of reading since Spreadtrum hasn't received as much Developer love as Qualcomm has
(15-03-2018, 01:15 PM)Super_seb1 So i have to check all sc7731c phone firmware for my region until find the right modem?
note that this blu is Dual Sim, fact that reduces the posibilities of finding a compatible modem
i've flashed before some modem.bin files from other phones in this blu, but i never found even one which could recognize the sim card