Hello all,

10 years ago it was simple. We had Vodafone which was GSM 900 and we had Telecom which was CDMA.

Today when I look at a phone spec and it says something like:

GSM 850 / 900 / 1800 / 1900
HSDPA 850 / 900 / 1900 / 2100

I have no idea if I'll be able to use it with spark.. or  vodafone...

I don't care for this particular phone, but I would like to understand what type/bands of mobile network we have here in New Zealand.

3G / 4G appeared since that 10 years ago mark and they do not make the classification easier.

So, can you tell me what network each of Spark, Vodafone and 2degrees have? (Do Vodafone and 2degrees share the same infrastructure?)

And also how come, that telecom is not GSM (or so I believe) but iPhones work just fine with them? The sim card looks exactly the same as all GSM sims I've seen.

Another thing is that I've been to South Korea and Russia about a year ago, and telecom sim works in South Korea but is not detected in Russia, and it is exactly reverse for vodafone sim.

Can some one explains why?

Thank you in advance!