Talk:United States/@comment-87.179.96.189-20160207232050/@comment-26674008-20160209045656

That ZTE hotspot device is missing band 4, which is very widely used for T-Mobile's LTE coverage. But its band 12 support might make up for that. It also might work fine for AT&T, but I can't tell for sure. It might depends on whether AT&T thinks the IMEI is LTE capable or not. We might not know until someone tries it.

The Lumia 640 Dual SIM makes sense. Mostly only travelers care about dual SIM, anyway.

For the "Network Compatibility" section, I think the current problem is some lack of focus. The purpose should be twofold: to help people figure out if their current phone will work, and to assist people who want to buy a new phone with extreme roaming compatibility.

For the former, the current description of all the different frequencies/bands, plus an explanation of how to tell what frequencies/bands your current phone supports. It's not easy as many phones are simply marked "LTE" and bands are hard to find. Chances are, if your phone is a US/Europe/Asia "model" then it will only get LTE in that region.

For the latter, there are very small number of phones that support all regions LTE and don't care what region model you have. Such as iPhone 6/6S, Galaxy S6, Lumia 640 dual SIM, possibly Nexus 6P/5X. A short list of recommendations may suffice, and get rid of all other models. Most smartphones that people care to get data for will support 2G and 3G except in odd places like China or US.