Well as you may not have saved any data yet you can reset the phone.
Settings > System > Advanced > Reset options > Erase all data (Factory reset)
Ensure bluetooth is off as your phone may be trying to connect to wifi 2.4Ghz which is the same frequency band as bluetooth.
Further switch to aeroplane mode then enable wifi as 4G network also uses the 2.4Ghz band.
Additionally ensure you do not format the SD card as internal storage.
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