Frequently asked questions (FAQs)

Welcome to the AT&T product support center. To get started: select a product category from the left, or enter your model number below to go straight to support and troubleshooting for that product.

Product Troubleshooting

Problem:

My handset displays either LOAD DELTA FILE or LOAD DEFAULT DELTA FILE. What should I do?

Solution:

Tip 1 of 2

If the handset is not responding normally, you may need to reset your telephone system. Complete the following steps to reset the telephone system:
Step 1: Disconnect the power to the telephone base.

Step 2: Disconnect the handset battery.

Step 3: Wait a few minutes and then reconnect the power to the telephone base.

Step 4: Reconnect the handset battery

Step 5: Wait about one minute for the handset to re-establish a link with the telephone base and then test the phone again.

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Note:


You may want to reference your product manual.

Or view basic troubleshooting tips:

Or view our service and order support tips: