I am using this. I have always used this brand
"Strontium Nitro A1 256GB Micro SDXC Memory Card 100MB/s A1 UHS-I U3 Class 10 with High Speed Adapter for Smartphones Tablets Drones Action Cams (SRN256GTFU3A1A)"
FRP locked or boot corrupted
Download latest stock and unzip it to get all the files.
Repartition, and flash.
Use all files including pit file
Cross fingers as it may boot to be fine the charge the phone and leave it for 2hours then reboot n use