You are billed for one full month in advance plus a partial charge for the period of the days the phone was activated to the end of the billing cycle. The first bill may also include onetime activation charge, taxes, USF and OUSF, airtime, roaming or data over and above the plan you are on and equipment charges. Taxes, USF and OUSF charges are remitted to the applicable entity and are not retained by Pioneer Cellular.