Use Sprint and T-Mobile together on your iPad Air 2 or Mini 4 with Google's Project Fi
Google's Project Fi, a cellular service allows you to use Sprint and T-Mobile's networks together on a single device, is now offering data-only SIM cards for use with tablets and other devices. You can order a data-only SIM if you have already activated Fi service, and tablets with these cards will have the same data price as your phone, $10 per gigabyte. When checking your data usage, it will be broken down by device once you install a data-only SIM.
In addition to the three Android tablets that google knows to be compatible with Project Fi, iPad Air 2 and iPad mini 4 owners can also take advantage of data-only SIM cards. This is the first time that Apple devices have been officially compatible with the project.
Project Fi's support page says that the data-only SIM could work in other devices (just make sure they're T-Mobile compatible), but beyond the above list the carrier won't be inclined to support or help you with issues if you choose to use a non-approved device. The page even goes so far as to say you could use the data-only SIM in a second phone, if you wish to just have data and not calls or texts.
As for other limitations, you can add up to nine data-only SIM cards to your account, though you can use the same card in multiple devices. Additionally, you cannot tether from a device with a data-only SIM. The ability to order these cards will be rolling out gradually to existing Fi users, and the option should appear in the next couple of days.
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Joseph Keller is the former Editor in Chief of iMore. An Apple user for almost 20 years, he spends his time learning the ins and outs of iOS and macOS, always finding ways of getting the most out of his iPhone, iPad, Apple Watch, and Mac.