I'll echo some other reviews. This is a basic Android phone, you can easily find this for £50 on any network. What those phones lack is substance and this handset has that in droves.
Firstly, it may actually be the last handset you ever buy. The functions I use most are texting and Wi-Fi hotspot and it has those. I'm actually using the internet connection on the phone as I write this. Battery life is insane, 4 days on average use. Build quality is ridiculous. I've not tested the claims but then why would I? it's an expensive phone. It's yellow, that is all I have to say on this point but I'll reiterate, it's yellow and has the word JCB on it. I don't know of any Samsung or Apple product that offer this feature.
Tips: Buy a big MicroSD card and an app manager so you can quickly move apps to this instead of the internal memory. You do have to be selective as to what you download but again, basic phone not a power house.
All in all a 5 star effort from a name you know. Don't be put off by other reviews from people who tried to break it and succeeded.