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s9 call problems after update

New Member

cant make or receive calls after update , immediatly disconnects after call is answered ,send or receive , initially thought it was sim card related and fitted new sim , it worked for 1 call then resorted back , tried carrier reset and full factory reset with no joy

New Member
ok so it turns out the update sets the network to 4 g only , set it back to 3g and now ok
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