When do you submit your information to MPC?

Don't feel bad.....I've been waiting for my GE renewal for just over 8 months. Some people hear in a day while others can wait up to a year.

No rhyme or reason.

As for MPC, this website should help:

https://www.cbp.gov/travel/us-citizens/mobile-passport-control

Once you submit you have 4 hrs to arrive, so I start the process while we're descending and transmit once I pull my phone off airplane mode.

JFK didn't even scan my QR code on Monday, the officer said they're not doing it anymore.

I thank you both for your help and information.
I hope that you have a great day!
Take care
Ken

Just to clarify, you can set up the app and your profile at any time. If there are others in your party you can set up their profiles as well. I had forgotten to upload a photo ahead of time so my profile photo is a hilarious selfie taken while walking down the jetway at the Seattle airport (don't do that!). The CBP questions need to be answered on or very close to arrival. I had some problems with my phone but by the time I got to the CBP area it had finally connected and uploaded my info. At the time I used it, the MPC line was only one person and the GE line was dozens, so it did expedite the process for me.

MCP is great! I set up everything before the trip. Then I answer the questions and submit when we land before I get off the plane. We’ve used it a few times — almost no wait and it’s free!

Photo?
I think I better take another look at the app.
I already took a picture of my Passport when I added myself to the app, I guess I better find where I add a picture.

That was easy, found the photo portion and added it.
Thank you for saving me an airport picture with possible photo bomb from a fellow passenger ;-)

Keep the faith re: Global Entry. It took almost ten months from application to approval for me. I had almost forgotten I'd applied. There seems to be no rhyme or reason at all to how quickly you get approved.

Keep the faith re: Global Entry. It took almost ten months from application to approval for me. I had almost forgotten I'd applied. There seems to be no rhyme or reason at all to how quickly you get approved.

2 friends applied 2 weeks before me and had their interview about 1 week after I applied. Another friend applied a couple hours after me and was approved in less than 48 hours. I hear it is all random and it looks like the dice came up snake eyes for me.
All is good as long as I make my connecting flight in Atlanta to Seattle.