1. simplest is take out your sim card, look for someone with a cutter and cut it off. 
  2. If youre brave, get a micro SIM, align with your SIM making sure the metallic contacts align, snip snip snip. Just be careful your cuts are smooth and well finished, otherwise you risk getting it stuck in your device, especially for those devices where you need a pin to take it out... a nasty experience.
  3. Walk to your customer care center for your provider and request for a sim swap, specifically ask for a micro sim. 
I have had experience with both safaricom and Orange, they DO have micro SIMS. 



On Mon, Sep 3, 2012 at 8:35 AM, Edith Adera <eadera@idrc.or.ke> wrote:
Listers,

Does anyone know if any of the operators have introduced micro SIM Cards? if so, how does one change to the micro SIM Card and have their number and contact details exported to the new card?

Pls let me know.

Edith



--
“The twentieth century has been characterized by three developments of great political importance: the growth of democracy, the growth of corporate power, and the growth of corporate propaganda as a means of protecting corporate power against democracy”