I think if you don't renew your contract, your original plan will just continue. You will not get the opportunity to get a new phone on the plan that you are in.
You have the Option to Avail Recontracting offers or rewards like rebate or device. You can change your Plan either Upgrade or Downgrade, No lock up period if your going to avail Line Only. You can call 730 1300 for loyalty offers. They can give you the latest phones but still depend on the recontracting offers.