So if Ur having problems like Ur device keeps on restarting and freezing or getting stuck or not booting maybe it's an sign of infamous emmc chip failing but thiers an temprory fix for it just follow the following steps again not 100% sure if it will work but there's still hope
Note: this won't work if u tinkered with Ur boot.img or Android system that's an software issue reflash the original stock rom via Odin and Ur good to go .
1. Power off Ur device
2. Remove all the accessories like SIM cards memory card battery and all.
3 wrap the phone with no accessories on an polithin or any thing which doesn't allow vapour or water get in ... Can't have Ur phone wet right ...
4 now put the phone wrapped inside polithin of paper or whatever inside refrigerator for upto 3 minutes
5 now after 5 min take the phone out of refrigerator and then undo the wrapping .
6 let it dry
7 try booting it by inserting only battery don't put Ur SIM cards yet ....
8 does it boot ? If yes congrats 😄 if no ? Try other threads on Xda maybe they can help
Thnxx for reading ..😀