6 Reasons Why You Can’t Move Your Cell Phone To Any Carrier You Want
 

You can buy a laptop or Wi-Fi tablet and use it on Wi-Fi anywhere in the world, so why are cell phones and devices with mobile data not portable between different cellular networks in the same country?

Unlike with Wi-Fi, there are many different competing cellular network standards — both around the world and within countries. Cellular carriers also like locking you to their specific network and making it difficult to move. That’s what contracts are for.

http://www.howtogeek.com/189831/6-re...rier-you-want/