@ sudhirian

to be honest, there is actually a rumour (i have tested this but doesn't work) that if you stuck a cellophane on the SIM card, it will increase the contact surface with the gold plated panels. hence this will improve overall signal strength from the network. TS has actually stuck two layers to his SIM card.

however, for my case i didnt cut the cellophane according to the shape of the SIM (as i have also anticipated this). i focused mine towards the centre bit. but once i have found that it doesnt work as prescribed, i removed it days later.

this also brings me to my next point, there were actual glue residues on the SIM card. this is obviously expected as the iphone do generate a substantial amount of heat. so those glue residues could have "spilled" over to the edges of the SIM card, causing it to be stuck.

i didnt offer my help to dismantle for two simple reasons; i'm not really an expert in dismantling one and i have not dismantle one with the SIM card tray still inside (fearing that it might break inside). try to look at the schematic drawings of an iphone and you will understand my paranoia if i cannot remove the tray first prior to dismantlement.