Android txt messages - not showing as blue

[Zhao0]

Hi

I just switched to Public yesterday from Fido. I own a Samsung S9 (still same phone). I just noticed today that my text messages to other Android users are now green instead of blue.  I checked my phone and nothing has changed. Has anyone else experienced this before? 

Your help is greatly appreciated!

[dust2dust]

Are you connected to the internet somehow?

[Zhao0]

Hi

Just switched to Public the other day from Fido. I have a Samsung S9 (same phone as before) but now all my text messages are showing as green and not blue (with people with android phones). I checked my phone settings and nothing has changed.  Can anyone help me out?