New Member
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4 Messages
NumberSynch Error Message
My new Galaxy Watch 5 will not synch with my Z-FOld 3 phone. The error mesasge is:
NumberSynch has encountered a problem. We're sorry for the inconvenience.
Code: SD-SDK-400
None of the technical support representatives know what to do. I have been on the line with AT&T for 4 days. Has anyone else seen this error?
Accepted Solution
Official Solution
ATTHelp
Community Support
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231.4K Messages
2 years ago
Hi williv1 we're here to help get your Galaxy Watch 5 synching with your phone.
Make sure you have the most recent software for your wearable and the Samsung Galaxy Wear app on your smartphone to ensure you have the latest features and device protection options.
Repeat the steps for setting up NumberSync to synch to your wearable. The following is required to use AT&T NumberSync:
• An AT&T postpaid wireless account that’s been set up for AT&T HD Voice
• An AT&T HD Voice-compatible smartphone
• A wearable device that supports AT&T NumberSync and has eligible AT&T wireless service
• An AT&T User (Access) ID associated with the smartphone number
Let us know if this helps, and thank you for contacting the AT&T Community Forums.
Jeff, AT&T Community Specialist
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