I recently sold an iPhone 4s which was used as a business line. The employee that used the line had created and logged in with her iTunes & iCloud account. I erased & reset all settings prior to selling the phone. The person that bough the phone called me up and said that he can't install things because its (I think) still logged in or associated with that employees account. I though if I erased and reset everything that would clear out anything associated with the previous user. I don't know how to get ahold of that old employee. So is there a way I can fully clear this phone of any thing associated with the previous user so that he can install things on his own from his account.