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Please what is the difference between nano, micro and normal sim? What is the sim size that the telecom operators provide? How do i use my sim with a phone that comes in nano sim variant? Will it affect my contacts if switching from for example micro to nano sim? What happens if im using a nano and im buying a phone that carries micro sim? Sorry for all the questions but im a newbie in technology. Thanks

bigspif:
Please what is the difference between nano, micro and normal sim? What is the sim size that the telecom operators provide? How do i use my sim with a phone that comes in nano sim variant? Will it affect my contacts if switching from for example micro to nano sim? What happens if im using a nano and im buying a phone that carries micro sim? Sorry for all the questions but im a newbie in technology. Thanks

Normal sim> this is mostly used by the ordinary phones such like Nokia torch light and some Nokia phone and even the blackberry os 6 and 7 phones.

Micro sim> when u buy a sim card sis days then u see that u can force tap a small portion out of the normal complete sim, the small portion tap out is called Micro sim. Mostly used by phones like iphone 4, 4s, blackberry os 10.

Nano sim> you get this form of sim card from cutting or trimming some part from the Micro sim, meaning its smaller than the micro. Some phones which uses this sim such as: Iphone 5 and 6 and some Samsung.

Note Both Micro, Nano and normal sim card are still been provided by same network operator

Here is a complete explanation with images of the SIM sizes
http://highteknology..com/2014/09/still-confused-about-mini-micro-and.html

Thanks Guys @ bongolistik and olexjay

Picture 1: The three sim cards. Normal. Micro. Nano

Picture 2: How to cut sim card.

Normal sim = mini sim