FreedomPop has all manner of gotchas to get you to inadvertently sign up for monthly charge services, and should you try to inquire about a problem they state you should get a response within 4-5 business days. When they do respond via email you have 48 hours to answer them or they close the ticket assuming it has been resolved. The help I have received has been sub-par.
A dispute of a billing charge will lead to your account being terminated.
Call quality is mediocre and sometimes text messages mysteriously show up long after they were sent, and sometimes not at all.
It is a free service once the phone is paid for, so it has that going for it, but between the spotty call quality and horrible customer service, you may be left wondering if the headaches are worth enduring for the free phone.