Usually power-cycling your router (and sometimes it takes power-cycling both the modem and router) to solve that problem...After doing that also reboot your tablets and phone to see if they get the IP address from your router.
Hi Lisa, give us a call at 855.43.9333 if the power cycle mentioned by wm4bana didn't work. Power cycling is the first step in troubleshooting your issue. You can also send an email to email@example.com with your account number and contact information. Thanks.