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OSCAL / Blog / Network

VPN

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VPN · 2025-08-04

Do Android smartphones/tablets have built in VPN?

Android's built-in VPN functionality is designed to support standard VPN protocols such as PPTP, L2TP/IPSec, and IPSec (IKEv2). Unlike standalone VPN apps, which often ...

WiFi · 2025-08-04

Will Wi-Fi emit radiation?

WiFi has become an essential part of modern life, powering our internet connections at home, work, and public spaces. But as its usage grows, so do concerns ...

Cellular · 2025-08-19

What is 4G+ (LTE-Advanced, LTE-A) on your phone?

When you look at the status bar of your smartphone, you might notice different network indicators: 3G, H+, 4G, LTE, and sometimes even 4G+. Each of ...

HOT

2025-08-21

How do I fix VPN not working on my phone? (Android/iOS)

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