Does green text mean phone is off?
You’ll always see green when writing to Android users, or when you’re not connected to the internet. No, it means the message is going through standard SMS/MMS texting protocol instead of Apple’s proprietary iMessage service.
Do green texts mean I’m blocked?
If you know someone has an iPhone and suddenly text messages between you and that person are green. This is a sign he or she has probably blocked you. Perhaps the person doesn’t have a cellular service or data connection or has iMessage turned off, so your iMessages fall back to SMS.