Before anything further please turn off all Advanced Privacy and check that the Location service works correctly in one or two apps.
Does the APN page show top right?
- Add
- 3 dot menu > Reset to default
Please re read my previous answer.
APN Setting and Troubleshooting 2026
What’s changed
Since ~early 2026 users are no longer required to enter values for MCC and MNC as part of APN settings. APN settings will be published by your carrier; be sure to get up to date data.
One would hope that the APN data will match
- on your SIM card,
- provided on /e/OS install and
- your carrier’s latest APN.
APN will likely fail if the SIM card data cannot be updated to exact current values.
Easiest
In case of difficulties one can ask the carrier to do an APN reset OTA (Over The Air) … alternatively
Manual APN Configuration
Ensure you have a good Wi-Fi connection.
Open Settings 
Search APN … or
Navigate to Mobile Networks:
Tap on Wireless & networks or Conections.
Select Mobile networks or Mobile data.
Access APN Settings:
Tap on Access Point Names or APN.
Add New APN:
Tap on the ‘+’ icon or Add button to create a new APN.
Enter APN Details:
Fill in the required fields based on your carrier’s specifications. [1]
Save APN Settings:
Tap on Save to save the new APN.
It is OK if Save takes a while complete … implies the the settings have been checked valid by the carrier.
Return to Settings > APN
Ensure the New setting is active with 
Troubleshooting
If you encounter issues while setting APN, consider the following steps:
Reset to Default: Navigate to APN settings, tap on top right 3 dot menu, and select Reset to default.
Activate Airplane Mode: Enable Airplane mode, wait for a few seconds, and then disable it to refresh the network settings.
Or Reset to default then Restart your phone while connected to Wi-Fi to refresh the network settings.
[1] For specific APN settings, refer to your carrier’s documentation.
I could research this further, the AOSP “presets” are organised by country. I find Boost “presets” in USA are you there.
Is there any chance that this device arrived Carrier locked – 4 ways to check if your phone is carrier locked. This is very common in USA.