I’m facing the same problem now, the 4G sign on the top right of phone screen show full bar, but cannot use any online function
I’m Apple user for many many years, and this iPhone 11 I hav been using around 3yrs, wondering how come it happen now?
Visited Aeon Cheras Selatan Machines to tell the technician my issue, he tell me to contact apple support, and i had a conversation with Apple senior advisor after a chatting advisor, he suggested me to do some more tests, these are what I tested
My SIM card to iPhone XR, 4G works well
My SIM card to Vivo phone, it works well
My SIM card to Huawei tablet, it works well
Other’s Maxis SIM card to my iPhone 11, 4G unstable again, and my phone become super hot and shows temperature too high after like 10mins, so I have to switch off the mobile data to cool down my phone… (searching signal will run battery usage much more than WiFi)
Well.. the last thing I havnt try is down grade my iOS… I’ll try it if the Apple advisor can’t find the reason..
The senior advisor promised my he will call back to me this afternoon.. let’s see…