Hello, BellVL.
Thank you for posting in Apple Support Communities. We’re sorry to hear about the issues you’re experiencing keeping a conversation going on your iPhone. You explained that you’ve tried FaceTime, Snapchat, Instagram, and Discord, and the call always disconnects. These are all web-based apps that require a strong and steady internet connection to maintain a call. Since you’ve already tried restarting your iPhone, we suggest the following the relevant steps outlined here:
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support
If you’re not using a Wi-Fi network, you might try connecting to one to see if it helps. Step #7 from the article is also relevant with a cellular data connection.
Still no luck? The answers to these questions may help:
- Which iPhone and iOS version are you using?
- Do you have any app updates available for the apps you're using?
- Is it happening with both a Wi-Fi and cellular connection?
Warmest Regards.