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summerthu's profile

1 Message

Tuesday, March 12th, 2024 7:56 AM

activate prepaid card error

I keep got error code as 'ERROR CODE: SSACT-543‘ after input my ICCID and IMEI number on
So I could not be able to activate my card and don't know what number of my sim card is. Please help 

Community Support


232.1K Messages

2 months ago

Hi there @summerthu, let's look into what's going on with your PREPAID account and this error you're getting. 


Our first recommendation would be to use this resource to activate your PREPAID account


1. Before activating your AT&T Prepaid account from your device, make sure it has been charged and that the AT&T Prepaid SIM card has been inserted (some devices may have the SIM card pre-installed). Once charged, turn the phone on.

2. You will receive a free AT&T text message. Select the unique URL sent in the message.

3. The SIM/ICCID number and IMEI number will auto-populate. Enter your 5-digit service zip code and the passphrase code, then select Continue.

4. Select whether you would like to Activate 1 device.

5. Select the desired rate plan, then scroll down to select the desired option for AutoPay. Select the check box to accept the Service Agreement, then select Continue.


You can also call us at 877.426.0525 for automated instructions. You will need to know your SIM/eSIM ICCID & IMEI number for activation.


Our second recommendation would be to activate your PREPAID device. Simply provide your ICCID, IMEI and ZIP code and click Continue


Please let us know if this helps. If not, we can continue offerign your further support. Thanks so much for reaching out to AT&T Community Forums!


Jessica, AT&T Community Specialist.

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