532aa1d0___Mobile_phones___Tesco_Mobile__Send_images_and_sounds
[2] Different smartphones have different operating systems that manage all the programs on the phone, making sure each one runs efficiently. Operating systems also provide a platform for developers to make apps. [Send images and sounds] 
Operating system
Doro - Phone Easy 611 - Pay as you go - Mobile phones - Tesco Mobile
Send images and sounds