My newly purchased Yealink from Voys

You bought a device from us, but it's not working yet. Follow the steps below to figure out what's going on.

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I bought new devices to replace my old device(s).

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I bought one or more Yealink T4x series.

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I bought one or more handsets with or without a new base station.

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I have taken my old devices offline, but it still doesn't work.

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I can't connect my handset to my base station.

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I'm doing exactly what the manual says, but it's not working.

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I want to order new devices.