Problem about other network
I have a problem in my iphone x about a network its shutting down everytime ,when i put the sim card it works fine in 1 minute and network works fine i can call and send sms and after that it will slowly become poor network until to no network,ive been in apple center so the
technician can check my iphone x but they didnt know what is the problem ,the iphone x can use all types of simcard and all types of network its open for all,they advice me to chance my simcard, ive change already 3 kinds of simcard and ive subscribe already to other network and tried already power off power on and tried also restored factory settings ,still the same problem,can anyone help me pls.,thanks