If you have an Android smartphone, then you don't have to buy any 3G modems. Moreover, most tablets, for example, can only be connected using a special cable.
You just need to "distribute" Wi-Fi from your smartphone.
Instructions
Step 1
Find "Modem Mode" in the list of applications on your smartphone.
Step 2
Turn on the "Portable Hotspot" checkbox.
Step 3
Set a password to protect your connection from third parties. You can use Latin letters and numbers.
Step 4
Open the Wi-Fi search on your laptop or tablet, select your network and enter the password. Everything! Wi-Fi is available from all your devices within 3-4 meters.
