Enabling GPRS and Switching between GPRS & GSM on a Locked Cingular T61z

Copyright 2002 John Navas, All Rights Reserved.
Permission is granted to copy for private non-commercial use only.

Posted as <http://attwireless.navasgroup.com/locked_t61z.htm>. 

NOTE: This information is provided as a public service. The author has no connection to Cingular or Ericsson except as a customer. The author is not responsible for any errors or omissions, or for any consequential problems that might result. USE AT YOUR OWN RISK.

See also:

• FAQ: AT&T Wireless GPRS/data/email (GSM) options (as of 6/02) explained
• Newsgroup: alt.cellular.cingular

Email comments and suggestions to John Navas.

When I started using a new Cingular-locked Sony Ericsson T61z, I noticed that it was using CSD (Circuit Switch Data, much like dial-up) rather than GPRS when I used WAP to access My Wireless Window, even though I had subscribed to Wireless Internet Express (GPRS). I found that I had to do the following to get GPRS working:

1. Enable GPRS in the menus:
    
   • Ignore the display while pressing the following keys:
     • [joystick right]
     • *
     • [joystick left]
     • [joystick left]
     • *
     • [joystick left]
     • *
   • If the above sequence is done correctly, you should see the Service menu
   • Service Settings [Select]
   • Preferred Srvc. [Select]
   • GPRS and GSM: On [Select]
   • Press [Back] twice to exit the Service menu
      
2. Enable GPRS in the phone:
    
   • [Menu] Settings [Select] Data comm. [Select] Preferred Srvc. [Select]
   • Preferred Srvc.: GPRS and GSM [Select]
   • Press and hold [Back] to return to main screen

Note: To switch from GPRS to CSD during Nights and Weekends in order to use off-peak minutes rather than GPRS data, use Step 2 above and select GSM Only. 

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