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USB551L
ajpresto
Member

I recently upgraded my USB 551L USB Modem and since the update I only get a yellow blinking light on the device. I have inconsistently received a message that had an invalid SIM card and needed to contact Verizon.

Any thoughts on a resolution? Perhaps downgrading the firmware somehow and trying the update again?

Thanks.

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Re: USB551L
commonsense101
Sr. Member

did you upgrade your vzaccess manager, are you sure the sim is in there correctly

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