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its not working still, and its the day after ive entered the new sim card number using my laptop 

yes is did  

Ive entered the new si number already   

yes, and i tried to choose my old number and it didnt allow me, just the new number so i didnt click it 

i followed the steps, there are 2 numbers showing, my old number and a new one, tried clicking on my old one and didnt do anything. what will i do ?