Do not change the MCC/MNC codes. These are your country and carrier IDs. If you mess these up, your SIM will stop working entirely.
The process for changing these settings varies slightly depending on your operating system: Open Settings and tap on Connections or Network & Internet . Select Mobile Networks . Tap Access Point Names (APN) . Click Add or the + symbol to create a new profile. 6g apn settings
If you see 6G on your phone today, you are using advanced 5G. Do not change your APN settings for "6G"—use your carrier’s standard 5G APN. Do not change the MCC/MNC codes
If you are looking to update your settings to get "6G-like" performance, here is how you can configure a custom Access Point Name (APN) on your device. The process for changing these settings varies slightly