Can I text if I just turn on Wi-Fi on my iPhone?

pu1. Wi-Fi has nothing to do with texting

2019-01-31

OK

pu2. I'm going to turn on the data

2019-01-31

OK

pu3. If it's regular sms, you don't have to turn on the data, you don't have to turn on the Wi-Fi, you just don't have to turn on the flight mode
I need to turn on the data for mms

2019-01-31

OK

pu4. @3 This is right

2019-01-31

OK

pu6. For your information, it's all the same whether it's

2019-01-31

OK

pu7. All phones are nothing between text and data!

2021-02-25

OK