In my research for my review of the KnowRoaming SIM sticker, I kept coming across ads for travel SIMs. I can totally understand the draw of these. The pre-travel jitters get the best of all of us ...

You might remember back in the day (especially in the United States) when CDMA was more prevalent and Verizon and Sprint phones didn't use SIM cards and typically couldn't accept them at all. Those ...