My MHS815L intermittently now will disconnect & show " no service available" even though we are in a full coverage area. This just started. I've used this in the same place since I got it, and only the last month have had it disconnect. Doesn't matter where I am. I've tried resetting the sim card as that was suggested, but no change. Just to type this I had to switch to the hotspot on my phone (which has 4 bars signal).
