Hey there Iwillneverrememberthisusername,
Thanks for reaching out to the Apple Support Communities. You can connect your iPhone to multiple different displays such as a computer monitor, TV, or projector. Check out the steps below for help:
1. Plug a Lightning Digital AV Adapter or Lightning to VGA Adapter into the charging port on the bottom of iPhone.
2. Connect an HDMI or VGA cable to your adapter.
3. Connect the other end of your HDMI or VGA cable to your monitor, TV, or projector.
4. If necessary, switch to the correct video source on your monitor, TV, or projector. If you need help, use your display’s manual.
You can find these steps at this link here: Connect iPhone to a display with a cable - Apple Support
Also, check out this next link for more information on using a Digital AV Adapter with your iPhone: About Apple Digital AV Adapters for iPhone, iPad, and iPod touch - Apple Support
As for using your cellular data to access apps and services, that can be done as well: Use cellular data on your iPhone or iPad - Apple Support
When cellular data is on, apps and services use your cellular connection when Wi-Fi isn't available. As a result, you might be charged for using certain features and services with cellular data. Contact your carrier for more information about possible charges.
We hope that's able to help.
Take care!
