is it possible to update Baseband to 6.15
 

family: iPhone
type: IPHONE 3GS 8GB BLACK
version: 5.0.1
serial: 8514310MEDG
mac: 28:CF:DA:8A:*****
iccid: 890141032543185****
country code: USA (United States)
purchase date: 2012-02-18 (t1, Purchase Date Validated)
purchase country/region: US (United States)
warranty coverage: Limited Warranty
warranty date: 2012-02-19 / 2013-02-17 (284 days remaining)
activated: yes (2012-02-19)
registered: yes
carrier: AT&T United States

current Baseband 05.16.05

Do not flash ipade baseband will damage wifi,imei,baseband