Which Phone (deal) to go for?

[SenSel]

So I currently have two options:

1. A 3 network deal via Carphone Warehouse for an S3 which is ?23 for 24 months.
I get 500 mins, 5000 texts and unlimited internet.
Total expenditure: ?552

2. Buy a nexus 4 and a tesco sim only deal for ?10.
I get 500 mins, 5000 texts but only 1gb data which I'm not sure how much actually is.
Total expenditure: ?439

Which is the better phone and which is the better deal?

I'm more worried about the phone...

If you have any other deals, please send them my way.

Thank you.

 

[SenSel]

Anyone?