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I bought this my phone Redmi note 11. Its execellent with everything I wanted. But after just 1 year, the battery have started discharging very first. Its really painful. I am looking for a solution

That is really bad, maybe it is because the warranty of the phone has finished

One time, My phone would occasionally go off even though it was just charged, i couldn't figure out what was wrong so I had to abandon it for days. It was a very challenging to stay for days without it, I was locked out of the social world.

It could be that there is a fault in the device motherboard

mine is poor Internet connection around here,as you know, ever since I bought my PC and phone, I have always had to deal with it

Maybe you can try tom upgrade the network from 3G to 4G

The battery of my PC doesn't last that long after charging it to the fullest.

Battery. I don't use phone that has low battery capacity but yet I always feel like phone battery should be built to last longer.