Mastodon for iPhone Keyboard Shortcuts · ExtraKeys/keys Wiki
Writing (collaboratively) the definitive guide to using iPhone with a Bluetooth keyboard. - Mastodon for iPhone Keyboard Shortcuts · ExtraKeys/keys Wiki
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Beware Bluetooth Keyboards with iOS Devices - TidBITS
Apple's welcome support for Bluetooth keyboards with the iPad and, in iOS 4, for recent models of the iPhone and iPod touch brings with it an unfortunate risk: if you regularly travel with a paired Bluetooth keyboard, be careful that it doesn't drain your device's battery, lock you out, or erase your data.
Why you should use your iPhone with a Bluetooth keyboard as your main travel computer | Macworld
Your iPhone is more of a workhorse than you'd think—especially when you add a Bluetooth keyboard to the mix.