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1 Message

Fri, Apr 13, 2018 8:53 AM

can't access call conferencing or cAll forwarding

When accessing Call Settings-Additional Settings, error message pops up stating "Network or Sim Card Error" and call waiting check box is grayed out. Also, when trying to access Call Forwarding Settings, same issue appears and call forwarding cannot be set up. 


Brand User



11.8K Messages

3 years ago

Hello @amatoast,

Thank you for your recent posting. We appreciate your participation within the Business Community. I'm sorry to read about the issue with your calling features. I'll be more than happy to take a look at this for you so we can get things back on track. Please send me a private message by clicking here ( and be sure to include the following details so I can help:

o   Account Name:

o   Contact Name:

o   Callback Number:

o   E-mail:

o   Account Details:

Thank you,


Social Media Manager

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.



1 Message

2 years ago

Have the same problem. "Network or Sim Card Error" and contact with support. The do quick job. Contact them asap Smiley Tongue

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