Putting your phone into airplane mode turns off all its antennae – cellular, wifi, bluetooth, GPS.
If you’re in airplane mode, but have a wifi connection, you can send non-SMS texts over the wifi connection, using iMessage on an iPhone or various other messaging apps (WhatsApp, etc.)
Can you send text over WiFi on Android?
You can send and receive text (SMS) and multimedia (MMS) messages using the Messages app . Messages are considered texting and don’t count toward your data usage. Tip: You can send texts over Wi-Fi even if you don’t have cell service. Just use Messages as you normally would.
Can you send text messages through WiFi?
If you are texting over WiFi abroad your message will be sent as an iMessage. Or if you purchased a small data plan to text using data (not SMS) you will also only want to text using iMessage to avoid texting charges. This is found in Settings–>Send as SMS and turn this off.
What happens when someone texts you on airplane mode?
Once the phone receives it, you’ll see delivered. Once the person reads it it will change into read. There is no direct status message for SMS / text messages on a Iphone so most likely the message will turn green and a message is display that the text was send as SMS if your phone is in airplane mode.
Photo in the article by “Help smartphone”