The SIM card in the 6620L MiFi device is one of the more difficult ones to change out. This is a quick video how-to.
Should you get the SIM Card stuck anyway, here's our guide to disassembling the 6620L to remove it:
http://www.rvmobileinternet.com/resou...
For our overview of the 6620L hotspot:
http://www.rvmobileinternet.com/resou...
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Chris Dunphy & Cherie Ve Ard host http://www.RVMobileInternet.com and are authors of 'The Mobile Internet Handbook' (the 2016 Edition coming out soon!!).
They also blog about their personal RVing lifestyle at www.technomadia.com.