What's the difference between GSM and 3G?
I want to get an iPhone and use Petro-Canada's mobile service, which uses Rogers' network (http://mobility.petro-canada.ca/en/features/396.aspx) it is a prepaid service, and i'm using because its cheap, but i guess no data for me (all data plans are expensive, and Petro Canada mobility only offers "Unlimited Mobile Browsing", which is really only for websites and such, not apps - it differs from Data)
Anyway, they say that in order to use my own unlocked phone with their mobile service, it has to be GSM compatible, and the iphone is (iPhone 4S).
Anyway, i did a little research about what GSM is, but i couldnt really understand, some say its a Data and Cellular service, and and some say its only a cellular service (only for calls and SMS, not related to data and mobile internet).
So now i'm confused, what is GSM?
is it data and cellular-related or just cellular-related?
Same questions go with 3G, is it a data-related thing? Or data AND cellular related?
Can you have 3G internet/data service with a GSM mobile network?
also, what is the difference between 4G and LTE (shouldnt they be the same)? And what's the difference between 4G HSPA+ and just 4G or LTE?
thanks a lot, all help is greatly appreciated!
Added (1). So are EDGE and GPRS data or cellular networks?
G is for generation2G, 2nd generation of cell technology is GSM which includes both GPRS and EDGE (Enhanced GPRS) (EGDE is perhaps 2.5G)3G, 3rd generation is UMTS which includes W-CDMA and HSPA3G is faster than 2G.
4G HSPA - High speed packet access.
&
4G LTE - Long Term Evolution network
4G LTE will be faster.
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