Will I lose anything if I reset network settings?

Resetting network settings on an iPhone or Android smartphone will not delete any mobile carrier functionality or account information . The process resets any changes to mobile preferences you may have made since you activated your device.

When you reset network settings, previously used networks and VPN settings that weren’t installed by a configuration profile or mobile device management (MDM) are removed . Wi-Fi is turned off and then back on, disconnecting you from any network you’re on. The Wi-Fi and Ask to Join Networks settings remain turned on.