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A portable WiFi router is just like your internet box at home, but instead of being attached to a phone cable, they have a SIM card inside instead. If you get an 'unlocked' portable WiFi device, this means you can use any SIM card, from anywhere in the world, inside it.

Following are the best software to remote access computer: Connectwise Control, Zoho Assist, RemotePC, TeamViewer, LogMeIn Pro, Remote Desktop Manager and Chrome Remote Desktop.

If you already have a smartphone, you already have a (potentially free) mobile hotspot at your disposal. Modern Android and iPhones come with a built-in option to turn your cellular data connection into Wi-Fi for up to five other devices. On many plans this can cost up to $25 extra per month.

You can connect devices together via WiFi and a router directly, without the internet. My printer is connected via WiFi via a router so I can print anywhere my WiFi covers, without the internet. WiFi is a network system like Ethernet. You will even now have a neighborhood network without the Internet connection.

If your computers have a wireless adapter installed, then you technically do not need a router to create a wireless network. Computers have built-in settings that allow you to build your own "Ad hoc" Wi-Fi network without having to use a router.

Therefore, if you go cheap, you can probably get everything to run a wifi access point for $50-100 (including the internet modem and cables). Then the cost of the internet service ranges from $20-100/month depending on the speed of the service and your service provider.