TP-Link Archer MR400 User Manual page 84

Q6. How to use the router as a regular wireless router to share my
internet ?
The router support two operation modes, 3G/4G Router Mode and Wireless Router
mode. If you already have a modem or your internet comes via an Ethernet cable from
the wall, you can set up the router as a regular wireless router to share the internet.
1. Connect your router's LAN4/WAN port to the modem or the network port.
2. Visit http://tplinkmodem.net, and log in with password you set for the router.
3. Go to Advanced > Operation Mode page.
4. Select the Wireless Router Mode option and click Save to make the settings
effective.
Note:
In wireless router mode, you can use 3G/4G network as a backup solution for internet access. When 3G/4G Backup is
enabled, your router will be directly connected to the 3G/4G network when the original network service fails. To enable
or disable 3G/4G Backup, go to Advanced > Network > Internet.
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