I cant play any sound on the speaker of the phone after the last update , of 1 April 2020But the voices are good in the Bluetooth devicesMy phone is a50What should I do?

i have a50 with two sim cards in my area the network is too low i know that the mobile trys many time to stringth it and gain connection but after some time , there is a msg that sim card is removed or cant be connected and it acts as is not ...