this invention regards wireless telecommunication network registration , roaming call origination , and roaming call delivery methods . the telecommunications network includes a roaming solution network , the network including a roaming server , a national location register , and an 800 number remote switching unit . the network may be integrated with a standard ss7 type telecommunications network and further coupled to an account based billing and call control platform that allows registered wireless credit limited subscribers to place and receive calls when roaming outside of their home provider &# 39 ; s network . the network may verify that the wireless subscriber &# 39 ; s account balance is sufficient to place or receive the call , translates the account balance into talk minutes , and monitors the call for talk duration . the roaming solution network is further operable to disconnect the call in the first negative minute and immediately decrements the wireless subscriber &# 39 ; s account .