BLUECOSMO ISATPHONE PREPAID AIRTIME: 500 GLOBAL UNITS, 1 YEAR VALIDITY. Equivalent to 333 Voice minutes, 1000 Text Messages (or a combination thereof) for 1 year. FREE incoming text messages & direct dialed calls. Outgoing Unit Values: 1-minute voice call = 1.5 units, text message = 0.6 units each. Unused airtime rolls over if refilled prior to expiry. Free balance check from your IsatPhone. Activate within 1 year of purchase..COMPATIBILITY: Works with Inmarsat IsatPhone PRO and IsatPhone 2 handsets, even those not purchased from BlueCosmo! Phone NOT included. SIM does NOT work with Iridium, GlobalStar or Thuraya handsets..TOP-NOTCH SERVICE: BlueCosmo, a top Inmarsat provider for over 15 years, is the only satellite provider to offer convenient 24/7 Online Activation and Account Management (self-serve refills, auto-refill, balance check & alerts). No activation fee or monthly fees. Helpful service anytime you need it..GLOBAL COVERAGE: IsatPhone coverage is worldwide, except for the extreme Polar Regions. Calls are made via a single, global network so there are no roaming charges..PERFECT FOR SEASONAL USE OR FIXED BUDGETS: IsatPhone global prepaid cards are ideal for short-term use or fixed budget because airtime is paid in advance so there are no overage fees. Add prepaid airtime as needed.