Thank you to everyone for all the help and suggestions. Some really good ideas there...
Two last questions; what's the best way to back this phone up (bearing in mind I have always used a desktop software like blackberry link).
And, what's the beat way to control the virtual keyboard? It sometimes is in the way when I don't want it, and other times I cant get it when I need it...
I personally never backed up my phone. Using my Lumia 830, most of my files are in my SD card such as pictures, music, etc. I couldn't care less about my app informations such as saved games and what not simply because I rarely game on my phone. I've a PC for that

. But from my time spent reading all the tips and tricks in this site, the best way to back up would be through OneDrive. You just need an internet connection, which is a must especially when you're planning to hard-reset your phone (to update all the apps and what not).
Controlling keyboard? I'm not sure if you're talking about a bug where the keyboard stays on the screen even when it shouldn't, but if that's the bug you're referring to, then you can only hope for a fix through updates (Never face such bugs tho. Lucky me

) But if I were you, I'd try pressing the back button once. Usually that fixes it when I'm using WhatsApp (opening message via pressing on notification opens WhatsApp with the keyboard on the screen, but I did not tap the chat box).
Also, you should know that the keyboard is resizable and moveable, as well as being able to turn it to left-handed or right-handed mode. To resize, press and hold the space bar button, and when the highlight box appear, swipe right to make the keyboard smaller and in right-handed mode, or left to make it smaller as well but in left-handed mode. To move them, do the same thing but instead of swiping left or right, drag the keyboard up or down.