Suggest a USB GSM modem?

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1

I’m looking for a USB GSM modem to use with my BeagleBone Black / linux. An external antenna connector is a must. Any suggestions for devices which work well with these boards?

Thanks!

2

first question - where are you? what gsm bands do you need to cover?

3

I have used the Nokia CS 12 successfully. Cheap at around $30 used.
My blog gives some info about using it:

http://beaglebonegsmmonitor.blogspot.com/2013/02/nokia-cs-12-gsm-modem-quick-notes.html