Can I use the mileage tracker app without data plan on my phone?

Hello Anonyme, 

Welcome back to the Community. I'll be glad to assist and help point you in the right direction so you can use QuickBooks to track your mileage without running into any issues. 

It's important to note that you'd need to be connected to the internet in order for the QuickBooks app to record your location. I encourage you to check out the requirements/checklist for successfully tracking your mileage using this article here. 

You're more than welcome to ask other questions as you go through the article. Otherwise, feel free to ask other questions, I'm here to assist.