iphone 4 unlocking solution wanted

would like to have the following iphone unlocked. any where where i can factory unlock it. thanks in advance:

01303************ .
Your info is : MODEL: IPHONE 4S 64GB BLACK
VERSION: 6.0
IMEI: 01303**********
SERIAL: DNP***********
COUNTRY CODE: BW
MAC: 60:FA:CD:87:*****
ACTIVATED: YES (2012-5-17 16:04:12)
REGISTERED: NO
CARRIER: Orange BWA(Botswana Orange.)
SIMLOCK: LOCKED