I bought an STi Mobile prepaid phone and service. I have used multiple prepaid phone services. This is the worst ever service BY FAR.1) They have many hidden charges and change them without notice. They added a 10 cent daily fee without any notice. They started deducting from my account every day until it reached zero. The fee was 365 days/year even if you don't use your phone. I didn't use the phone for a couple weeks and my account reached zero. Once the balance reached 0 for 14 days, they deactivated my phone. Once deactivated I lost my phone number and voicemail. If your phone is disconnected because they added some new fee and started deducting, you are not notified. I only found out when I tried to make a call.2) Watch the fake rebates. They used a rebate to get me in, but once my account hit 0, they said my rebate was now disqualified because I hit zero. I hit zero because they added a fee without any notice. Now I have to pay for activation again. When I called then about this what did they say? "The customer is responsible to review the terms and conditions often on the website for any changes." Needless to say, I'll choose another carrier and will not reactivate with them.3) Their customer service is useless. They ask you to repeat information again and again. When you call about a problem or question, they tell you to call back after they can talk to some other department. You call back and they claim to have no record of your last call.4) Want to know your account balance? You can't know your account balance without calling customer service and talking to an operator or making a call. They used to tell you your balance if you dial a number and hung up before it connected. But they changed that policy without notice. Now if you dial a number to know the balance you will get charged even if you disconnect right away. Customer service response? "Yes, we changed that. You (the customer) are responsible for reviewing the terms and conditions on our website."5) Want to buy a recharge card directly from the STI website? Oops, you pay an extra service fee.They are clearly trying to get you to buy the service and play games after you activate your number. I thought it was cheaper than other prepaid services I had used before. I learned the hard way that the additional fees and deductions cost me more than I thought I would save.Never use STi Mobile service. These guys are going to get really familiar with the BBB really fast with the stuff I experienced and what I keep hearing about them.