My phone is on its last legs, so looking around for an upgrade and thinking of jumping ship from Orange who I've been with for nearly 10 years.

Orange, Voda and Tmobile all have a daily cap on data spend - either £1 or £1.50, but I can't find anything to indicate if O2 have similar. Does anyone know if they do?

Nope, just binned my O2 contract because the data charges are huge. For £6.50 a month you can have a 200MB per month limit, or do it Pay as you go for £5 per MB.

I went T-Mobile with Web'N' Walk plus in the end. The £1 a day limit for pay as you go usage has a max data allowance of 40MB per day, with Web'N'Walk for £7.50 a month you get 1GB per month. On the plus tarrif at £12 per month you get 3GB allowance.

Isn't 3 unlimited internet now? The contract I'm going with Vodafone is free mobile interweb too.