Thank you all very much.

The reason why I'm thinking of buying a sim contract for my phone is because council tax is not in my husband's name as we are currently staying at his parents' place. For now, we can't also have any utility bills in our name. (We plan to move out when we've saved enough so we can have the tax and other bills in our name. Practically, we chose to be here because it's free,of course..while coping up the money spent in regards with the expense of bringing me here and so on.)

It just confused me because I've read somewhere that some offices don't accept mobile phone bills for PHONE bills.. and seeing "phone bills" as one of the documents in the checklist worries me. You know this feeling of "I know it's okay" but still want to be reassured to ease the mind.

I managed to open a bank accont though without a hassle but it's beause it's an HSBC passport account. I also attended my NIN interview yesterday and just waiting for it.