Few tips if you are going to buy a new mobile phone:
.what matters most to you, write it down. Do you need a phone with large screen, small screen.figur out what your needs are.
.Android, Blackberry, iOS and windows phone, these are the four main choice of today.
.Android it is developed by Mr. google. It is similar it is iOS. Android is open source operating system.
. If you love keypad and hooked on BBM than blackberry may be for you.
. The iphone is only phone that runs iOS and apple plans to keep it that but iOS does not allow as much as Android does.but it has clean and simple design.
. Window phones, instead of relying on a grid of shortcuts and a notification try, window phone uses live tiles which are half app icon, half widged.everything on your homepage can display moving information & graphics.
. A smartphone can have single SIM, double SIM & can even have 3 SIM slot. Chose it on your requirement.
Besides watch out for micro SIM, mini SIM, ful SIM.
.camera according to your choice. What you are like the most selfie like OPPO specially show its selfie in plus point.