Google has fine-tuned its mobile Gmai service for iPhone and Android users. Google has added some new features which help the iPhone and Android users to get through their e-mails responsively.

The new faster address auto-completion feature suggests possible contacts when a user types the first few letters of a contact's name or e-mail address. The feature is similar to the desktop version.     

About the second feature, Google wrote in its mobile blog. Google wrote, "Now you can use all those familiar Gmail keyboard shortcuts to quickly move through your inbox. For example, if you're reading an e-mail you can press 'u' to return to the inbox or 'n' to move to the next conversation."

Google introduced the new version of Gmail to Android and the iPhone in April. Google expects up to 18 smartphones to be released in the second half of this year. HTC will launch two Android smartphones – the HTC Hero and the HTC Lancaster – on June 24.