Phone support

Resets

iphone: spin it around 10 times

android: turn it upside down and shake it 

nokia: hold down the speaker

Adding a new number: 

iphone: shout "I want to add a new number" into the microphone

android: go to settings, add new number

nokia: go to the shop and buy a new sim 

Low battery :

iphone: plug it in

android: put it in a bowl of water  

nokia: take it in for repair