How do I get rid of iMessage "inviting" to sign in?

[question everything]

I was out of the country for a week and texting was useful.

I use my iPhone for texting but everything also appears on my iPad which I had with me.

My last text did not go because I was not connected to a WiFi network. Was OK. We were landing.

But now on my iPad I am locked from my texts by a large screen telling me to Sign in with my Apple ID to activate iMessage.

There is nothing I can do. I don't know what iMessage is, I don't care, I just want this message to disappear.

Any suggestions?

Thanks.

[Historic NY]

1. Look in your apps file under setting

you could delete there.

[question everything]

2. Thanks. Did not work. The icon of the texts is now called iMessaging

no delete option. Same thing I had to sign in.

Glad I am home now since some months ago I had to get a new one which of course I don't remember.

Will have to find a new way to remember.

[usonian]

3. Texting on an iPhone IS iMessage.

Look under Settings->Messages.
On my phone, there's a slider to turn iMessage on or off.

Is this what you mean?

On the same menu, there's an option to "Send as SMS" which is the same as old-fashioned texting. It will use cellular data when a wifi network is not available (I think) --- It says "Send as SMS when iMessage is unavailable. Carrier messaging rates may apply"

Also, under settings->cellular, there's a slider to turn off cellular data (useful when abroad, since in many countries, cellular data will cost a lot --- depends on your plan)

This *is* kind of complex.
The other day, the phone rang and the call showed up on the iPad, which was a bit surprising, and it went smoothly.