Can some please tell where I can unlock an Iphone (model-3gs)? Preferably close to Yunda.

Thanks,
Rob

I can do it

www.ch999.com.cn

5 minutes walking distance from Yunda

总店地址：昆明市圆通北路127号云大晟苑0812室　[位置地图]

销售热线：0871-6225969(6线)

There are a number of unlock / jailbreak solutions available online. Just search iPhone + either of the aforementioned terms.