The truth is, if you’ve bought and activated your iPhone 4S with a GSM operator, you won’t be able to roam in CDMA networks. It's touted as a world phone with a dual antenna setup capable of working under both GSM and CDMA (CDMA 800/1900 and CDMA2000 1圎V-DO). The iPhone 4S has quad-band GSM and HSPA support, with download speed of up to 14.4 Mbps and up to 5.8 Mbps for upload. You can tether over Wi-Fi, Bluetooth of USB Just hit the on switch and choose connection type. Tethering over USB or Bluetooth is also enabled. The latest iPhone 4S supports Wi-Fi b/g/n standards, as well as Wi-Fi hotspot. Peer-to-peer connections over Wi-Fi, and even Bluetooth, are a way around this but they only work between iPhones and via third-party apps. We are guessing Bluetooth 4.0 will be big with accessories, but won’t eat into on NFC’s territory.īluetooth file transfers are still not available. We’ll see how it goes, Apple certainly is a trend-setter, but it’ll have to start from the ground up. Credit card companies are joining in too. NFC isn’t moving very fast either, but Nokia has vowed to include it in all their phones (and they still have plenty of market share) and Samsung is including it in some of their devices, with some carriers eager to use it. Other than that, adoption of BT4.0 is pretty low. On the up side, the new MacBook Airs and Minis support Bluetooth 4.0, so a good portion of the iPhone 4S buyers will already have a Bluetooth 4.0 enabled device. Things like wireless keyboards will probably get in on the action too. BT4.0 is also intended to work as electronic leash, wireless lock, various types of heart-rate sensors and such. So, gadgets like the Nike+ can really benefit from BT4.0 – there’s barely any data to transfer but improving battery life is a huge plus. It has lower latency and higher range, but doesn’t have the bandwidth for bulk data transfers. The iPhone 4S has the power-efficient Bluetooth 4.0.
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