Google has created a special version of its Gmail e-mail service that provides mobile phone subscribers with quick access to their e-mail, the company said on Friday. Details on the mobile e-mail service, which currently is only available to U.S. cellphone users at https://m.gmail.com. The service works on the subset of more advanced mobile phones that offer an Internet browser. Users can view attached photos and documents from their phone, and reply-by-call to people whose phone number is stored in their Gmail account.