Here are several easy options for publishing to your fans via your mobile phone:
Click "Edit Page" under your Page’s profile picture. Go to the Mobile settings module, click “Edit” and you will see the email address for your Page. Tip: save this email address to your phone’s address book as your Page’s name.
To update your status, send an email with your status update as the email subject line. To upload a photo or video, email the photo or video and use the email subject line as the caption.
Anyone emailing this address will be able to post to your fans, so please only share this address with other Page admins.
2) iPhone Application
To find your Page, click "Friends," then "Pages" in the bottom right. You'll see the Pages you are an admin of under "My Pages."
We suggest you click on your Page, click the top-right arrow icon, and click "Add Favorite" so you can get easily navigate back to the Page.
To publish to your fans, simply use the publisher (the "What’s on your mind" field) or click the photo icon.
3) Mobile Browser
The easiest way to find your Page is to type in the URL for your Page. To obtain a personalized Facebook URL for your Page, visit facebook.com/username.
If you are using a touch phone, you can also navigate by touching "Friends," then "Pages" on the top right.
Use the composer (the "Write something…" field) to update your fans.
4) Text Message (SMS)
Click "Edit Page" under your Page’s profile picture. Go to the Mobile settings module, click “Edit” you will see the link for “Sign up for Facebook Text Messages to post status updates to your Page”
You can associate multiple phone numbers for a single Page. However, you can only associate one Page or profile to each mobile number. If you associate a mobile number to your Page, that number cannot be associated to your profile or another Page.
Please note that if your carrier is not listed in the drop-down menu, they are not currently supported for Facebook Text Message. Please contact your mobile operator for more information.
Mobile Blogging from here.