The application should work with any supported SIM that offers SMS features. You will be charged for SMS text messages according to the plan associated with your SIM card. I do not believe it's possible to add SMS packages to the native plan, so if the app works at all, you'll likely be charged $0.25/text at the standard US AT&T a la carte rate.
The app has been tested primarily in Sweden on the Telia network, but its developers have been doing SMS apps for three years now -- so it's a good bet that things should work out of the box with standard AT&T SIMs for United States users. Given that the app is free, if you have any problems, I'm sure the devs will offer a full money-back guarantee.
After thoroughly testing the software with your equipment, you can upgrade to a no-ad version for five bucks, or a full-featured MMS/SMS app (SwirlyMMS) for twelve.
- Key specs
- Form factor Tablet
- Operating system iOS (8)
- Screen size 9.7 inches
- Storage type Internal storage (16 GB, Flash)
- Maximum battery life Up to 10 hours
- Dimensions 9.4 x 6.6 x 0.24 in
- Weight 0.96 lb
- Announced 2014-10-16