I have a Samsung s3 for nearly 2 years and I'm having a lot of problems, it freezes, in the right hand corner next to the battery display it comes up with a sign like this🚫, I can't use it, it turns its self off and then takes ages to turn on and then the battery can show that it's empty, I am on my second battery, I hope someone can help, I don't actually want to leave O2 as they have been great, I paid my phone off but still have the contract with my calls etc.
