For those without Wi-Fi, IrisVision now offers a Data Usage Plan.
$20/month Add Data Usage Pan for access up to 500MB of data a month
*$30 a month for International Plans
Note: IrisVision offers up to 500MB of complementary data usage until you have connected your device to Wi-Fi. SIM cards will deactivate after 500MB of data usage or 60 days of use with no optional data plan purchased.