TikTok is not working on 4G.

Hello,

The connection should not be constant (regularly insufficient, like every 5 seconds).

Does it happen when you are in a car/train/bus?

There’s not much you can do (other than change your geographical position), but you can always try a complete restart of iOS.

Charge it for at least 10 minutes.
Do not unplug & Press the Power button and the Home button (the center button at the bottom) simultaneously for 30 seconds.
Depending on the iOS:
Please keep me updated => "It’s resolved thanks to / I found I had to" or "Still at a dead end"
because I often have several steps and always one more trick up my sleeve!!!