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I believe the 4S did away with distinct models for GSM and CDMA. The cellular chip it uses can handle both, much like the Galaxy Nexus. (Unsure as to why the
by riblack3 15y ago
I believe the 4S did away with distinct models for GSM and CDMA. The cellular chip it uses can handle both, much like the Galaxy Nexus. (Unsure as to why the Nexus supports T-Mobile's AWS bands and the iPhone doesn't though, maybe the antennae.)
I would speculate that the reason carrier unlocked phones do not work with CDMA is related to their agreement with Verizon (and/or Sprint).
- ansible 15y agoWell, I'm slightly surprised at that, but if anyone can do it, Qualcomm can. As for 3G bands, it is common enough to make a 3G system that supports 3 frequency bands. Supporting 4 is difficult, and 5 bands usually entails significant performance compromises. So since the carriers aren't all on the same bands, you usually have to pick and choose. The iPhone 4 previously had design issues with its antenna system anyway. They fixed it, or at least people don't complain about it anymore. But major fixes (like supporting an additional frequency band) might not be possible without significant re-design.