I'm trying to make the GPS device I've made from Arduino work. This device is made from an Arduino Uno, SparkFun's MG2369 Cellular Shield, the Taoglas passive GPS antenna (from here: http://www.mouser.com/Search/ProductDet ... 25E070054A), SparkFun's Quad-band cellular duck antenna, a SMA-U.FL converter, and a T-Mobile standard-size SIM card on the North America 3 GB 30-day On-Demand pass.
My device will not send texts, read coords, or even tell me the SIM's phone number. I know now that my SIM card doesn't work in this device. However, it's going to be a lot of trouble finding another SIM that will actually work, especially now that the SIM I wanted to order from SparkFun is on indefinite backorder (seriously I really hope they don't retire that card!). Do any of you know any (tried-and-true) ways to get SIM cards that will work in my shield? Or ways to get the card I have to work in it?