Small isn’t always beautiful when it comes to SIM cards: with three different SIM sizes kicking around, it’s quite possible that the SIM from your current phone won’t fit your next (or second) one. If you’ve ever wondered how to use a nano SIM in a Galaxy S5 or in micro SIM slots, we’ve got
the answers. Here’s how to use a nano SIM in any phone.

SIM card sizes explained
There are three kinds of SIM around: standard, micro and nano. Standard SIMs were the original and tend to appear in slightly older phones, such as the Galaxy S2 and HTC Desire HD.
The next size down, micro SIM, was developed to help make smartphones slimmer: when you’re trying to cram so much technology into a single case, every millimetre counts. Micro SIM slots appear in the Galaxy S3 and S4, HTC One X, Sony Xperia S, T and X and so on.
The next and final size is the smallest, the nano SIM. You’ll find nano SIM slots in the iPhone 5 onwards and in Android devices such as the HTC One (M8).
We say there are three sizes, but there’s actually a fourth and fifth option: a multi SIM, whose credit card-sized moulding can be snapped out to make a standard, micro or nano SIM card, or a combi SIM, which can be snapped out as a standard SIM or micro SIM. You’ll often see multi and/or combi SIM cards when you’re looking at pre-pay phones or SIM-only contracts.

Read more: http://mobiletechnstuffs..com.ng/2015/10/how-to-use-nano-sim-card-in-any-phone.html