Is This A Good iPhone Plan?! Please Help Me!!!

II_D2_II

Hello all, I would like a little help regarding my contract.

I am Currently on:
K850i
400 mins
1000 texts
unlimited 02 to 02 calls
£20 a month

but the problem is, i want an Iphone for my next phone.

so i was thinking, is this the best way for me to do it:

Buy the Iphone for £300-400 on Pay As You Go
and then retentions my contract, and see if i can get myself the highest priced phone possible to sell for as much as i could (ideas anyone?!)
with my retentions deal, i make sure i get unlimited internet, and then i put my sim card into my iPhone and continue with that.

would this save me the most money?!

if i was to get the iPhone contract it would cost me:
£96 for the phone itself
£35 a month
which gets 500 mins and 600 texts.

Please, Please, Please help me out on this one.

Thanks in advance
II D2 II

II_D2_II

wrong thread lol