Philippines location specific sub domains

by adding location specific sub domains like
manila.brandfinder.com
subic.brandfinder.com

will these location specific sub domains make mobile searches more productive?

If a mobile consumer using a phone looks for a local brand in Manila will these sub domains make this brand search easier?

Can these subdomains be made accessibly for local small businesses to upload their own content? – specials coupons offers or new menus ? Will Google Analytics be able to track traffic to these sub