The SMS Message Center Number is a phone number that acts as a gateway for transferring SMS messages between cellular devices.

No phone call is made to send or receive SMS messages but this number is required for routing SMS messages through the network.

Likewise, the SMS E-Mail Center Number is a gateway for transferring SMS messages to the Internet (for email delivery) and vice versa. You do not need a personal Internet Service Provider (ISP) to send an SMS to an email address. As long as this feature is supported by your mobile service provider, the Internet access is included.

If you would like to use SMS messaging, contact your mobile service provider for details and advice.

Where are these numbers stored?

1. Launch the SMS application.
2. Access the Menu launcher.
3. From the Options pulldown menu, select Preferences.
4. The SMS Message Center and SMS E-mail Center number should appear. (Treo 600 note: tap on the tab that says SIM). If you do not see any numbers, it means your mobile service provider does not allow you to change these numbers.

Usually, you don't have to touch these numbers. If you suspect they are incorrect, contact your mobile service provider and ask them to send an Over The Air (OTA) message with the correct information in it.

What are the numbers?
Normally you shouldn't have to enter these numbers manually. But for your reference, here they are for the major GSM carriers in the United States:

SMS Center

• AT&T:
  • +19078319301
• Cingular:
  • +12099042010 (West Coast)
  • +17045020600 (East Coast)
• T-Mobile:
  • +12063130004
• Rogers Wireless (Canada):
  • +17057969300
• Fido (Microcell - Canada):
  • +15149931123

This number is usually pre-set in your SIM card and should not have to be manually entered.

SMS Email Center

• AT&T:
  • 0000000000 (ten zeros)
• Cingular:
  • 121 (West Coast)
  • 111 (East Coast)
• T-Mobile:
  • 500
• Rogers Wireless:
  • 0000000000 (ten zeros)
• Fido (Microcell):
  • 003436

Most mobile service providers give you an email address for your mobile phone. When someone sends a message to this address, it arrives on your handset. For example, if your mobile number is 1-650-555-1111 ...

• AT&T:
  [area code] [phone number] @mobile.att.net
  (6505551111@mobile.att.net)

• T-Mobile:
  1 [area code] [phone number] @tmomail.net
  (16505551111@tmomail.net)

• Cingular:
  1 [area code] [phone number] @mobile.mycingular.com
  (16505551111@mobile.mycingular.com)

Setting up the service
For instructions on setting up SMS and SMS Email service on your Handspring device, see click here).