Mobile phone tech chat.

[margaret]

I have recently changed my phone provider and am allowed what they call a bundle, with unlimited text and calls before my next monthly top-up date. My allowance is something like 3071MB's what ever that is, I top up with a tenner for this amount of usage, I didn't use up all my MB's before the month was up so they just cancel what I didn't use.
Its all seems so much mumbo jumbo and confusing to me.