I have a Huawei Ascend 300. Probably no one's ever heard of it but it serves me well enough. 10 pounds a month (Sim only plan) for 300 minutes, unlimited texts, and 500mb internet, is good for me. Phone was a one-off of 100 pounds I paid last year. Good buy IMO.
I don't have the budget to spend like $50+ a month on a phoneplan especially when trying to save for a property.