Apple Watch cellular can’t connect

[Alex13]

every time I try and connect my Apple Watch to Three network I get below msg. Other posts seem to suggest just keep trying until it randomly works?? Has Three not found a solution to this problem? Do I need to change networks? 

403 Forbidden

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Microsoft-Azure-Application-Gateway/v2

[MichaelP]

Hello @Alex13,

As we didn't hear back from you on this, I was hoping to check in to see how you're getting on with your Apple Watch.

Are you still experiencing the same error message? If so, had you amended any settings on the device itself?

Thanks,
Michael

[PeteG]

Hi, Alex. 

Do you have any VPN active? Or have you changed any of the APN settings on the device?