Yes, it is truly unlimited data. Be aware that, in my experience, the dats service performance (speed) is a bit slower than the paid T-Mobile service, but the price is right! The connection is extremely similar to the paid T-Mobile service (I am a former President's Cabinet Verizon Wireless Arizona Business Sales Channel Manager and a former T-Mobile Business Sales Executive) and I don't experience dropped calls except from a metal building that I rarely have service from with any carrier of radio station, so I use a free Text Now account to augment with Wi-Fi calling inside that building. This gives me a business number (I pay TN $5 a year for a static number) for Wi-Fi and business calls and a personal number using wireless cellular. The personal number is with QLink and I have no complaints about the service which has been very reliable and high quality. -Mark