After change router i have newtwork access but not internet

Hi, my friend replace the router for a 4G router and now he can access his network (1 server + 2 computers) but he dont have internet access. He have a yellow sign on internet symbol saying "no internet connection".
We have all cables connected to switch including the router cable...
Should we configure something else? Thanks
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More about change router newtwork access internet
  1. Often, you must tell the ISP of the new device, so they can authorize that MAC address on their system.
  2. The router works great by wireless but desktops dont have internet. Do i have to configure ip on ipv4 options?
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