Go to www.pingo.com

You can buy minimun of $20, with that you will get $5 bonus. Get pinless, so that you don't have to worry about dialing pin all the time. Talk time will be over 3 hours, you can talk for even 20 min a time and still there will be no hidden deduction. Line is very clear. Basically it has worked for me, hope it happens same for you.