A1688: The global phone has almost the same bands as the A1633, except that there is no LTE band 30 (2.3 GHz WCS spectrum deployed by AT&T). Apple also started selling the A1633 as the sim-free unlocked version on Apple Store and you will have to pay full price for the device. It is available on AT&T and some more carriers in the US. A1633: The iPhone 6S A1633 is the most comprehensive model. The new generation also features LTE-Advanced (LTE-A) which supports download speed of 300Mbps and Voice-over-LTE (VoLTE). AT&T customers will also notice a better experience as some models support the new LTE band 30. If you are on T-Mobile, you will see a boost in LTE signal, especially when you are inside buildings, because all new models include support for LTE band 12 (700MHz spectrum). Fortunately, the number of model numbers is the same as iPhone 6 last year and Apple also covers 3 more LTE bands (23 as compared to 20 bands on iPhone 6). The iPhone 6S and 6S Plus come in 8 models, including A1633, A1634, A1687, A1688, A1699, A1700, A1690, and A1691, and they have different cellular connectivity. However, you should be careful because your new iPhone might not be compatible with your carrier. You must be excited about the launch and want to get hands on the phone as soon as possible. The phones were launched with the 16GB, 64GB, and 128GB storage options but the 16GB and 64GB were discontinued and replaced by the 32GB option since 2016. As we all expect at this time every year, the new iPhones have arrived and again we get two new phones in 2015, the iPhone 6S and iPhone 6S Plus.īoth of the models features significant upgrades like 3D Touch, 12MP iSight camera, 4K video recording, faster CPU and GPU performance.

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