Sorry folks I am off again

I have a samsung galaxy note 10.1,and a samsung galaxy ace 2 contract phone. We have 1 kindle fire and. 2 ordinary kindles. Question is will they work and do they have to be registered, and if so how do you do it and is there a time limit that we have?
Am I better off getting a new phone, a simple one with internet,calls and txts. Does anyone have any recommendations as to which phone,or contract or pay as you go is the best value (cheap)!
Appreciate any advice.
Thanks
Bernie