https://uk.trustpilot.com/users/5ce6a966ec87ee*******e4503

That's my TrustPilot review, their response and my further response.

To sum up - they sent me a phone which completely ceased to function. I sent it back and I want a refund. Because the phone didn't die within 30 days they have fixed and returned to me (despite me contacting them to tell them not to) the original phone. I have zero confidence that a company who say they send out phones which "function perfectly" and which have apparently made it through being "quality assessed" and so I don't want their replacement, I want a phone which I have confidence in and trust to work, which is not one from this company. They have accepted the fault is their's but have still left me out of pocket and penalised. The 30 days in immaterial, in that the product sent was not fit for purpose.
Save yourself time and effort and go elsewhere. I eventually managed to get a reply to them AFTER I posted a review on TrustPilot which says that they think more about their external reputation than they do about my actual customer experience.
Or tie two tin cans together with string, because that will work better than my phone did.