I was recently hotlined for a past due balance. Funny thing is I auto-pay every month my same set amount it always has been through my bank's web bill pay thing. This led to me doing an audit of recent bills.
I found "Socialcard: alerts", as mentioned above, billing me extra $10 for the last two bill cycles. Searching google led me here, as well as to several other useful sites. Figured I'd post up:
This is the source of the billing:
SocialCard:
SocialCard
Also, Google revealed this...it also has something to do with GameStop:
GameStop Alerts! Extra $9.99 on your bill - SprintUsers.com
Apparently SocialCard is all tied in with facebook and crap... so who knows where it actually comes from. I clicked on the cancel button and input my number. It said my number is not subscribed! This led me to calling Sprint about this, as all my lines are already blocked from purchasing premium services in Ensemble.
Long story short, the premium services block only covers applications/ringtones, not premium texts. The rep blocked premium SMS from all my lines, and after a short hold time, removed the two months worth of "billing errors". He also let me know if anybody else I know receives SMS messages from any short code (5 digit number) that they did not request, they should reply with STOP immediately. Kinda goes against what all has been taught to us with regards to spam and all.
Although I still find it amusing I was receiving bills from a company that apparently had no records of me ever subscribing?