Apple 4s can slide the screen when unlocked, but SMS and phone can't be opened.

whether it is a system problem. . . Or the touch problem. . .

your 4s. . . It's already a very old model. . .

change the touch screen if you touch it. If it is a system problem, then you can restore the factory settings. .

But I really don't think it's necessary to fix it. Apple's 4s is a 2g network, and its speed is very slow.

if you want to repair it, it can be used by the elderly, and it is still very good.