Not going into detail with the actual phone company itself.
But, I recently went into the store that used to be 3, which is now just Vodafone.

I wanted to get a new sim card as I am with 3, so that I could transfer to Voda.
The guy put in a new sim, but my phone wouldn't accept it as apparently an incorrect pin code had been entered too many times. Which is ok, as I had let people use this phone when I had my other phone.

Anyway, the guy could not unlock it, so told me to go to the Vodafone 'place' on Greenhill Road.
He did not give me a street number, telephone number, no other details, aside from "it's about ten minutes from here"
Well, I don't drive, so "here" could have been in the middle of nowhere for all I knew.
I have never been given such terrible directions! Good thing I just ended up storming out, otherwise I would have gotten lost trying to find this place!

phones are terrible quality, staff are rude and completely unhelpful when you want assistance, overall service is terrible. do not recommend anyone shop here EVER

It is so nice to be treated just like any other customer! I am a switched-on senior and have found all the staff are attentive, courteous, and have a great manner,( even a sense of humour) and are very patient with me when they explain the "wonders" of the Mobile Broadband world to me!
I have had quite a few visit to the store and am always greeted by a friendly face and smile. I do all my mobile phone and mobile broadband business in this store. I highly recommend them to anyone who finds the whole computer "thing" overwhelming at times.

Approximate cost: $varies