I did the cutting of my SIM initially to Micro size in RPtech (first floor of lulu) for QR.10, then when i wanted to use the SIM in iphone 5 i went again to them in order to cut it to Nano size but they said that they can do it for Qr.20 but without warranty.
So i went to Qtel and they informed me that they will replace it for me free of cost.
So better get a new SIM.