iPhone won't charge and keeps restarting, it won't even die.

I had this issue, and solved it by plugging into my iMac with iTunes running. Entered recovery mode by pressing the home and wake buttons for 10 seconds, and the phone stopped cycling and started charging. Actually doing an update or recovery is optional, but it’s not a bad idea.

You were able to use iTunes to update it . . . did the Mac or PC also charge the phone? If so, maybe the problem lies with your charger. It could be defective . . . and some cheapo generic chargers don’t have the firmware that the iPhone needs to talk to.

It’s ok now. It kindah solved by itself. By the time I was updating the iOs.

Thank you everyone !!!

The computer won't read my iPhone and I can't get it to do anything because it won't stay on long

It sounds like your phone is having trouble charging properly, likely due to the damaged charger or a connection issue. The phone may not be receiving enough power to charge, causing it to restart and freeze at a low percentage. Try using a different charger and cable to see if that resolves the issue. If the problem persists, there could be internal damage from the drop, such as to the charging port or battery connection.