Yes, the 2ndLine app requires an internet connection to function.

It uses VoIP technology, meaning it transmits calls and texts over the internet instead of traditional phone lines. So, you'll need either:

• Wi-Fi: For an optimal experience with stable sound quality and lower data usage.
• Mobile or Internet data: Connects you anywhere, but be mindful of data charges depending on your plan.

Here's the benefit: No need for separate phone lines or SIM cards! Just activate your 2ndLine number and stay connected through your existing internet connection.

Pro-Tip: 
• Check your Wi-Fi or mobile data strength before important calls to ensure uninterrupted communication.
• If Push notification is not enabled, you may not receive messages and calls

I hope this clarifies things!