A510F no wifi after upgrade 7.0

I've this phone

Code:

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Searching Samsung modem... detected COM85
Reading phone info... OK
Model: SM-A510F
AP version: A510FXXU5CRB1
CSC version: A510FOXA5CRB1
CP version: A510FXXU5CRA3
Product code: ITV
Phone SN: RFXXXXXXXX
Unique number: C00001990C8CEA3
Reading IMEI... OK
IMEI: 3543610XXXXXXXX (SIGN: OK)
Done with Samsung Tool PRO v.31.0

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After OTA update i can't no more turn on wifi.
I've tried to manually downgrade and upgrade but wifi is no more available.
Is there a fix for this?
Thank you