It's crippling to see the iPhone keyboard disappear when you want it. Some bug can keep the iPhone keypad invisible – and just when you need it, you might see that it's missing.
From what I've gathered, the problem can occur due to a variety of reasons most notably three: the iPhone is still connected to some Bluetooth keypad, or there's some problem with an app or ill-fated software update. There are some tried and tested solutions that can help you bring back the missing software keyboard on your iOS device. Let's give them go to cut the chase!
iPhone or iPad Keyboard Missing or Not Appearing? Try These Solutions
Hard reset your device
The first thing you should try to resolve this issue is to reboot your device. Simply press and hold the Home and power ON/OFF buttons at once for about 10 seconds until you see Apple logo on the screen.
To hard reset your iPhone 7/7 Plus, you need to press and hold the volume down button and ON/OFF button simultaneously. (Related: How to reboot iPhone/iPad without power On/OFF button.)
Switch off Bluetooth. May be Reboot once.
If you connected your iPhone to some Bluetooth device – notably the keypad – and then did not disconnect it, there's a strong chance that the iPhone still thinks that it shouldn't show the keypad.
The one way to fix this is that you switch off the Bluetooth. May be to reboot your iPhone once too just to be sure. Does this fix the issue?
Reset All Settings
Still, keyboard hasn't shown up? Try resetting your device to factory settings. Don't worry as it won't delete any media or data of your device.
Open Settings app → General → scroll down and tap on Reset → Reset All Settings and confirm.
Restore Your iOS Device
If none of those above solutions have worked in resolving the problem, restore your device using iTunes. Make sure to back it up before going for the kill.
Connect your device to computer → launch iTunes → select the device → click on Restore iPhone/iPad and confirm.
In most cases, this problem is fixed just by rebooting the device. I hope you have found success with this little trick itself. Have you any feedback for us? Feel free to share it with us in the comments below.