Worst customer experience i've ever had. They upgraded my phone, didnt send the new 4g simcard then insisted it was EE's issue. EE said it was not and eventually (after much back and forth) they sent me a new card with the wrong number and said dont worry they will migrate the number and that i will still be able to receive calls whilst they did it. I run my business though this phone an nobody could get hold of me. They then blames EE again. More fool me for staying with them after the EXACT same thing happened on my last upgrade with them 2 years ago. DO NOT USE CARPHONE WAREHOUSE, THEY ARE INCOMPETENT