new i phone but no 3 month free apple tv

If you have had an (extended) trial before, then you are not eligible for a new trial. One trial per user, regardless of buying more devices.

If you are eligible, then you’ll have to redeem the offer in the TV app on your new qualifying Apple device. Find the “Enjoy 3 Months Free” redeem button there.

Read here how to redeem: Apple TV+ offer - Apple

Read here about the conditions: Apple TV+ offer - Terms and conditions - Apple

Read here if you have trouble redeeming: If you can't redeem your promotion for an Apple subscription - Apple Support

↳ Step 5 says to contact Apple if the prior steps didn’t bring a solution. They can assist.

I can’t sign up for 3 month free trial

What is your qualifying device? Did you buy it new within the last 90 days, from Apple or from an Apple Authorized Reseller? Did you register that device with your Apple ID account? Did you try to redeem on that device?

What happens when you try to sign up for the trial? Do you get an error message? What does it say exactly?