Which one has better service, coverage, speed, and if the money is worth what you're paying for?
P.S Don't mention Verizon or AT&T, we hate paying for limited data.
"we hate paying for limited data"...shocking! most of us get a thrill out of it.
Seriously, without knowing your location, we won't know if you even have coverage on either one. T-Mobile has way faster 3G speeds, and blazing fast 4G. But their coverage is much more limited.
Spring is more widespread, but their speeds are significantly lower. Their 4G is almost non-existent except for large cities, and their LTE although fast, is also not widespread.
Based on that alone, I would recommend T-Mobile. But you need to know where you will be using your phone, and if it has the coverage you're looking for. Just because you have coverage, doesn't mean you have 3G/4G coverage, and just because you have 3g/4g coverage doesn't mean it's at it's full capacity.
Before choose you cellphone network,you should know about GSM and CDMA.
CDMA(Code Division Multiple Access) is a digital cellular technology that uses spread-spectrum techniques.CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built.It doesn't have sim card.
The reason for more GSM usage is that the international Roaming of GSM is Very good and it has sim card,So you can easily swap your sim card when you need.For choosing your cell phone network,Go to a phone shop in town, tell them what you want, they can advise.Before getting your cell phone service provider,Make sure your phone is unlocked and accept that carrier,If it's restricted by other network carrier means,You will need to unlock your phone.For unlocking you can approach your current network provider or else try to buy an unlocking service from any one of the online unlocking service provider like Mobile-Unlocker.com I hope it will be very useful to you.