So I've just bought a spark sim and had my number transferred over.

Only recently did I remember that someone said my phone is only good for 2 degrees / Vodafone, ooops.

I tried the sim anyway and have found that I can use mobile data, and send / receive texts but can't make / recurve phone calls.

So do text messages use a different network to phone?

is there anyway around this? Although I'm guessing I need to transfer back to 2 degrees.

If it helps Phone details:
GSM 900 / 1800 / 1900 - D838
3G bands HSDPA 900 / 2100
4G bands
LTE band 3(1800), 7(2600) - D838