I've read multiple threads discussing the two carriers here on MacRumors and am something of a techie. I'm interested in what others think about my little carrier decision. The short version: Switched to AT&T in 2010 for the iPhone 4. Had a mostly solid experience, no significant problems. Contract expired this month, so am trying Verizon for an iPhone 5. Also had an AT&T iPhone 5 for awhile. What I'm torn between: AT&T: + GSM network + Simultaneous voice/data + No UTF-8 SMS/MMS oddities like apparently happens with Verizon? + HSPA+ support (has ranged from 3G speeds to 10 mbps down in my area) + Where both are present, AT&T LTE tends to be faster than VZW's (maybe just because of less utilization so far?) - No LTE coverage in my area, and no plans to add any in 2012 - Seemingly less building penetration of cell signal - Possible reliability issues in larger markets (though unlikely to affect me) Verizon: + Seemingly better building penetration of cell signal + LTE coverage present here (has ranged from 4-27 down in my area) + 3G coverage here not bad compared to AT&T lower-end HSPA+ or even their 3G + Factory unlocked iPhone 5 + Free personal hotspot (though of limited use to me) + Seemingly better coverage nationwide, for the most part - CDMA network - Voice overrides data on iPhone 5, even with LTE, due to antenna issue - Occasional UTF-8 weirdness when texting out of network - Where both are present, Verizon LTE tends to be slower (saturation issue?) As for Sprint, I was with them in the past and had few, if any, problems. Left for the iPhone 4 at the time. They're planning LTE in my area and the unlimited data thing is appealing. Opensignal.com suggests it's a wash between the two where I am, slight edge to VZW. I spend a lot of time in hospitals and do use my phone as a primary GPS when traveling in unfamiliar areas, which argues for both carriers. I may be moving next summer, not sure where yet. Curious what MR says about this particular situation / take on things.