Awful. I took out a 12mth contract in 2015. I had the sim for my daughter. 2 months into the contract my daughter lost her phone. I tried for 2 months to get a replacement sim with their useless customer services who often have a very poor grasp of English. Cut to 4 months in i cancel my direct debit. I've now paid back the charges despite hotly refuting that they had kept to their end of the contract (they had no record of me calling). I have been chased by 3 different debt recovery agencies - the latest wants £61. I've now paid more than double what I owed and cant speak to them to get a resolution. Avoid at all costs.