I got magic jack and had the performance level internet from Comcast. After working good a few weeks, I cancelled my comcast phone and downgraded my internet to economy plus to save money. Suddenly the magic jack was dropping calls or you couldn't hear half of anything. I got frustrated and tossed it in a drawer. My son later told me that with a voice internet service you have to have a minimum speed. I upgraded my speed back to performance and low and behold it works good again. I didn't know this and never saw anywhere that speed mattered. If you can't get yours to work, check what speed your connection is.
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