I want 3G/4G dongle to connect it via USB to my Raspberry Pi because I want Internet when there is no WiFi to send same scanned data.
Any suggestions (Works in France) ?
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Please refer to the section on the elinux page here for the list of 3G/4G adapters which other people have tested with the Pi.
I think most of the 3G/4G SIM cards would work with the adapters mentioned there, you can check with your carrier and make sure that the adapter you choose does support those frequency bands.