Owning a Lumia 710 and Nokia N8, I can never make up my mind which device to take out. Mainly the latter as I don't want to be without the camera on the N8. After you, someone, in a comment, gave me a tip about using the Lumia 710-cut-down micro SIM in the N8. Here's my success story using this technique.
- Put in a normal SIM into the N8 and mark the SIM holder either side of the gold plate. This is to line up the micro SIM later.
- Using some sellotape, attach a piece onto the back of the micro SIM and fold over the end, making a tab to grab hold of.
- The micro SIM can then be pushed into the SIM holder in the N8, lining it up with the small marks made earlier.
- Close the plastic cap - this clamps the sellotape tab, preventing the micro SIM from moving.
Removing the micro SIM is easy but may require the use of tweezers to grab the tab. The photo below shows the SIM back in the Lumia 710 with the tab showing. I am not sure if the tab would get in the way in the Lumia 800’s SIM tray or in other micro SIM devices - comments welcome if you've tried this!