I have an old Doro flip mobile and it was locked but not by my old sim provider. Message on mobile was to key in code. I was trying different numbers which i thought might be the code and i used up 4 of the 5 lives so only had one go left.the reviews were not good but for the price i took a chance. Paid the fee and the code came through, i keyed it in and i was thrilled when it worked straight away. No waiting. So i am very happy. Thank you.