Student or Learner
"This phone keeps on getting dropped."
Is it correct? Or should I phrase it again?
If you mean that someone continually drops that phone on the floor, then it's fine (if a little unlikely). If you mean that calls keep being disconnected then you would say "Calls keep dropping when I'm using this phone".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.