This is about a 10 year old hotspot, originally on T mobile. I received it second hand, and this is what I can tell you: 
It is carrier locked to T mobile. 
T mobile says that the IMEI is blocked due to the original contract not being paid off. 
So, it is pretty much useful for parts, or as a small wifi router, minus internet. 
The battery does seem to hold a charge for a while and it can be charged using a micro USB cable. 
Fair Offer Policy applies
 ZTE MF915 hotspot (Newtown Rd and Va Beach Blvd)
Collection Times
Anytime, will leave on mailbox
  Anytime, will leave on mailbox