This app does concern me so I decided to post about it. I discovered this upon going into settings/security/device administrators. Apparently it is supposedly meant for corporate customers to control what an employee does on a company issued cellphone. However, I believe this has no business being on privately owned phone. It has ugly and restrictive privileges. I had to use Titanium Backup to remove it as it would not allow me to deactivate it as device administrator. I do know it is not needed as none of the leaked builds ever had it, and recommend removing it.
Here is some information I found on it (check the images a couple posts down on the first link).
Sprint Community: Sprint, please explain "com.sec.sprextension.phoneinfo" in Device Administrators
and
Sprint Community: Unauthorized Admin act com.sec.sprextension added by Sprint
Here is some information I found on it (check the images a couple posts down on the first link).
Sprint Community: Sprint, please explain "com.sec.sprextension.phoneinfo" in Device Administrators
and
Sprint Community: Unauthorized Admin act com.sec.sprextension added by Sprint