WiFi is a wireless network where you can connect your technology in your home hub. You can protect your WiFi by changing router password, disable SSID, changing SSID, turn on wireless encryption, enable router firewall and disable auto connection.
3g is a wireless program connected to phones and broadcast towers. You can protect 3g by using the KASUMI block cipher and other security protocols.
sms is a wireless protocol that connects texting. You can protect this by lock phone and never leave it unattended.
bluetooth connects devices to each other wirelessly. You can protect it by service level security and device level security.
