actually it's illegal for ZVRS block the customers abilites to use ipad for personal use plus communicate and ZVRS not brought ipad as they keep say that ZVRS brought it and you and we are the "term of lease" when the 2 years it doesn't matter the expiration. It still own by ZVRS unless you keep use their z5 on your ipad and make call often as they see you over-used, once 2 year later you can ask them to keep it and unlock something you can talk them out.
likewise you able to delete the PROFILE and the APPS will back on it.
Have FUN! .... I not yet delete the apple id, i was not sure if it's will create my own apple id afterward.