Mobile AdServe offers an inexpensive way for struggling business owners to advertise through a carefully planned mobile advertising campaign. The basics include creating a text ad with a link to your website and selecting relevant keywords. General predictions estimate the global mobile ad market will reach $11 billion by 2011, though some have concerns about subscriber acceptance of mobile ads. Currently there are over 4 billion mobile users connected at any time across different world regions, with 3G subscriptions and networks continuing to expand access to internet-capable phones.