OnePlus9r opinion
My OnePlus 9R stopped working last wee, seemed like a display issue in the beginning but it was a CPU issue that i got to know from repair shop.
They tried repairing it which would've costed 2500₹ , but found it it couldn't be repaired. I have asked in a couple of more shops too.
Now they suggested they can replace the board with another phone's used one, but it will take time to arrange the new motherboard, and it's gonna cost 7k₹ .
Since i am short on budget at the moment, i am considering it but it will take time.
They have also suggested a second hand OP 11r for around 15k₹, not sure if second hand is worth it.
New motherboard will cost 14k₹ from service center. I do no have the bill of this phone, and it is quite old so not under warranty. Though it was working smoothly until it stopped all at once.
Also if you have/ know someone who can give motherboard in cheap that will be really helpful