[OnePlus 3 & 3T Cross Device Development] Ashish.akc:
Phone freezes with black screen and have to hard reboot

I know you devs must be very busy with the work you already have but I request if you could help me out. I have only 2 days of warranty left on my phone so that makes things scary.

I recently got my motherboard changed but still have the same problem. No problem what ROM or kernel I use I get the same issue. I have been facing this since last 3 months and no solution till date. So please if you could just find some time please read on.

(Am posting the same text over a couple more threads as well in order to maximize the help I can get. So please forgive me for that.)

I currently have two sim cards:

BSNL: 2g and 3g coverage only

Jio 4g: only 4g coverage.

So I primarily use my data from Jio 4g but I recently also recharged my BSNL as well because of low data rates and also so that I can use more data per day. (They both have per day data plans).

When I use data from Jio sim, it uses the 4g network and hence the BSNL shifts to 2g only mode and I don't face any problems. But when I switch to BSNL sim for data, it jumps to 3g and the jio sim has no network because it only has 4g coverage and no 2g network. That's all expected. But that's the setup when I face problem in.

When am using my phone it runs smooth and every thing is perfect. But when I leave it aside for some time and come back to see it, it doesn't responds. There is only black screen. It doesn't responds to power button or the charging cable. It just sits like that. I have to hard restart the device by pressing the power button for like 15 seconds. And the phone eats battery while it was in that state of unresponsiveness. It occurs randomly. No phone calls or alarms ring while in that state and it eats a damn lot of battery.

I tried swapping sim slots but that does not changes anything. I switched places (and they were all at least 20 km apart).

But the strange thing is that when I swap either of the sim cards with any other 3rd company sim there is no problem whatsoever is the sim selected for the data. Also if I use the BSNL and JIO 4g one at a time(only one sim at a time) I don't face any problem even then. It only occurs when I use both of them together and that too when the data is turned on in BSNL. I have tried nearly everything I could. And now you are the only help left.

(And those who get annoyed by this post(s) please swallow in your anger as am already really broke as of now)

I will help you in any possible way I can.

Currenctly on stock OOS with locked bootloader but tell me and I'll move to your desired setup.

Update: i forgot to mention about logs. sorry for that. i know a little about taking adb logcat and i know that without logs no one would be actually help me out effectively. so please guide me on what kind of logs i need to get(logcat, radio logcat or kernel log). also since am not rooted adb will be the option for taking logs

also i created another thread different section in order to make sure that things don't go further off topic because of me on this thread. so if it is relayed to my post please go this thread

Update: updates the above linked post with normal logcat and a radio logcat. please if somebody could look into the issue....