No outgoing/incoming calls on custom ROM

[sandeep_kumar]

I was using stock 9.0.3 with unlocked bootloader and data encrypted.
Last night I tried to flash Skydragon ROM without any firmware. It booted to system but calls are not working. I then flashed oreo 5.0.8 fw but in vein. I also flashed "9.0.3 bl fw with 5.0.8 key master", even the Calls are not working. I thought there may be some issues in Skydragon latest ROM, so I flashed Nitrogen ROM but with the same issue. It also booted and I used all types of fw but Calls are again not working.
Now I thought the better way to install the ROM is to format the phone. So, I formatted the phone rebooted back to TWRP(latest one) and then flashed the Skydragon ROM with oreo firmware. Now, I am shocked, even if I am flashing the ROM after formatting but each ROM now flashed is having problems of neither outgoing calls nor incoming.

I finally flashed again 9.0.3 ROM after formatiing so that I may get calls functionality.
The conclusion is that I am unable to flash custom ROM.

Is anybody has the answer, what am I doing wrong. How to flash custom ROM?

 

[CamRooni]

I was using stock 9.0.3 with unlocked bootloader and data encrypted.
Last night I tried to flash Skydragon ROM without any firmware. It booted to system but calls are not working. I then flashed oreo 5.0.8 fw but in vein. I also flashed "9.0.3 bl fw with 5.0.8 key master", even the Calls are not working. I thought there may be some issues in Skydragon latest ROM, so I flashed Nitrogen ROM but with the same issue. It also booted and I used all types of fw but Calls are again not working.
Now I thought the better way to install the ROM is to format the phone. So, I formatted the phone rebooted back to TWRP(latest one) and then flashed the Skydragon ROM with oreo firmware. Now, I am shocked, even if I am flashing the ROM after formatting but each ROM now flashed is having problems of neither outgoing calls nor incoming.

I finally flashed again 9.0.3 ROM after formatiing so that I may get calls functionality.
The conclusion is that I am unable to flash custom ROM.

Is anybody has the answer, what am I doing wrong. How to flash custom ROM?

Well it seems to be pretty much complicated problem while I think not using any firmware is the problem because there is not any other problem that seems to me is bothering with the calling services moreover did you flashed custom ROM from twrp or not and before doing that have you selected wipe and check... You didn't explained your steps correctly I have flashed both the roms to test and they are working fine on my device and going back to stock and again flashing to another seems to work for me you are missing some important step in flashing I think so...

 

[sandeep_kumar]

Well it seems to be pretty much complicated problem while I think not using any firmware is the problem because there is not any other problem that seems to me is bothering with the calling services moreover did you flashed custom ROM from twrp or not and before doing that have you selected wipe and check... You didn't explained your steps correctly I have flashed both the roms to test and they are working fine on my device and going back to stock and again flashing to another seems to work for me you are missing some important step in flashing I think so...

I have flashed many ROMs. and as per my knowledge I flahsed the ROM after formatting the user data.
Then copied the zip files to device after rebooting to recovery off course.
Then you know: flash ROM followed by Gapps. I have flashed NOS, NLOS, RR, Skydragon. All booted but calls are not working.
Finally I decided to overcome the issue.
I flahsed 5.0.8 ROM and after booting I made a clean flash for the NOS.
Now, ROM succeeded and all is working along with call.