We are constantly getting "slow network" error. The only way to fix it is to turn the router/modem off and let it recycle. Would a new router/modem help? We are on Frontier network, using one of the ancient NetGear7550 outfits. I am electronically challenged, but my husband is pretty good. We are looking at possibly purchasing our own router/modem. Any suggestions for a good one that would support 2 cell phones and 2 laptops (all going at one time, max)? Thank you for any help you can give.