Check your device settings
- Make sure that you’re connected to a cellular data or Wi-Fi network. If you're using an iPhone, you need SMS messaging to activate your phone number with iMessage and FaceTime. Depending on your carrier, you might be charged for this SMS.
- Go to Settings > General > Date & Time and make sure that your time zone is set correctly.
>>>>>I have done this - I am in Thailand and the clock on all my Apple devices is correctly indicating local time. BTW, my MacBook and iPhone are behaving correctly. I have tried this with a VPN bringing me in via the US and without a VPN, so coming in through Bangkok.<<<<<
>>>>>Also note, when I click on my name in settings, I can see I am logged in to iCloud (based on the fact I can see how much storage is used) from the iPAD, but when I go to my iPhone, it does not report that my iPAD is online (based on the fact it is not found under 'find my iPAD')<<<<<

Turn off and restart iMessage and FaceTime
- Go to Settings > Messages and turn off iMessage.
- Go to Settings > FaceTime and turn off FaceTime.
- Restart your device:
- Turn iMessage and FaceTime back on.
>>>>>I have done this. When I open iMessage it asks me to sign in, and then it tells me 'signing in', and after some time it tells me it could not reach the server<<<<<

Still not activated after a day?
It might take up to 24 hours to activate iMessage and FaceTime. If the issue continues after 24 hours, follow these steps:
- Make sure that your device has the latest version of iOS or iPadOS.
>>>>>ios 14.2<<<<<
- If you're using an iPhone, contact your carrier to make sure that you can send and receive SMS messages.
>>>>>I receive SMS messages, just not iMessage messages on the iPAD. Additional, the sign in message makes it impossible to reply to any SMS messages on the iPAD<<<<<
- If your iPhone is used with a carrier not found in the wireless carrier articles make sure you can send and receive international SMS.
>>>>>T Mobile<<<<<