APN settings (which stands for Access Point Name settings) contain information that’s needed to make data connections through your phone — especially internet browsing.

What does APN setting do?

An Access Point Name (APN) provides all the details that your device needs to connect to mobile data. If you are setting up a new device or putting your SIM card into a device for the first time, your network operator should send you their APN details in a configuration message.

Is changing APN settings safe?

No. It won’t damage or affect the phone or SIM. If you have issues, go back to your old APN (or another). The only thing changing APNs could effect is your ability to send/receive MMS, and data speeds (which you’re seeing the improvements already).