Phones Getting Lumia 640 / iMessage

[perkedel]

Picking up the Lumia 640 today. I had the 521 and kind of missed my 64GB SD card.
Currently using the iphone 6 plus, it looks like I need to deregister my number here https://selfsolve.apple.com/deregister-imessage
has anyone tried this before where you still have the iphone, how long did it take?

 

[bkends35]

it deactivates instantly

 

[three]

You could also deactivate iMessage on the iPhone before you pop the SIM into the 640 and it should deactivate that way too. Either way works though.

 

[maflynn]

Mine auto deactivates when I move my sim from the iPhone to my Lumia.

 

[nepalisherpa]

When I switched my personal SIM briefly to Note 4, I did all that. Deactivated on the website and turned off iMessage, but none of that worked for me. I would get individual messages but group messages seldom worked. I ended up putting my personal SIM back on the iPhone 6 Plus and use Note 4 strictly for work.