Same issue on my iPhone 13 mini. Displays a strong 4G signal to the network but just keeps loading and loading and loading and nothing happens until it times out. It happens so often that I’ve learnt the sequence it follows. If it loads for more than 3 seconds, then it’s the mobile data malfunctioning again. Hit aeroplane mode and reconnects to the network, again strong 4G signal, then most of the time it rectifies the problem and your able to load web pages and use apps, but it very often goes straight back to that dormant 4G connection a few minutes later. Tried everything, no joy. Given up on trying to solve it.
