Hey there! I totally get how frustrating it is to hunt for clear setup guides for the F670L as a wireless repeater—especially when the router’s settings feel like a confusing maze. Let’s break this down into super actionable, jargon-free steps since you’re an average tech guy (no overly technical stuff, I promise!).

First, let’s cover the prep work for your main router (the one already connected to the internet):

• Make sure it’s fully set up and working with a stable WiFi signal.
• Note down three key details: its WiFi name (SSID), WiFi password, and WiFi channel. To find the channel, go into the main router’s WiFi settings—look for an option labeled "Channel" (it might be set to "Auto" right now). Change it to a fixed number (like 6 or 11, these are less crowded) and save the setting. Don’t leave it on Auto, or your repeater might lose connection randomly.

Now, let’s set up the second F670L as the repeater:

1. First, reset it to factory settings to wipe any old configurations: Find the small "Reset" hole on the router (usually on the back), press and hold it with a toothpick for 10 seconds until all lights flash, then release. Wait for it to restart fully.
2. Connect your phone or laptop to the repeater’s default WiFi (it’ll probably be something like ZTE_XXXX—check the label on the bottom of the router for the default name and password).
3. Open your browser and type in the router’s admin address (most likely 192.168.1.1 or 192.168.0.1—again, check the bottom label if you’re unsure). Log in with the default admin username and password (also on the label).
4. Now, look for the WDS Wireless Bridging or Repeater Mode option. This is usually under "Wireless Settings" or "Advanced Wireless Settings" in the menu. Since your settings are complex, keep an eye out for terms like "WDS", "Wireless Extension", or "Relay".
5. Once you find it, turn on WDS mode, then click "Scan" or "Search" to find your main router’s WiFi name (SSID). Select it from the list.
6. Enter your main router’s WiFi password in the corresponding field. Then set the repeater’s WiFi channel to exactly the same number as your main router (e.g., if main is channel 6, repeater must also be 6).
7. Next, set up the repeater’s own WiFi: You can use the same SSID and password as the main router (this lets your devices automatically switch between strong signals) or choose a different name—either works, but same password makes it easier to connect.
8. Critical step: Change the repeater’s LAN IP address to be on the same network as the main router, but not overlapping. For example, if your main router is 192.168.1.1, set the repeater to 192.168.1.2 (any number between 2-254 that’s not used by other devices). You’ll find this in "LAN Settings" or "Network Settings".
9. Save all the settings and let the repeater restart. Once it’s back online, test it: Connect your phone to the WiFi, walk to an area where the main router’s signal was weak, and check if you can still browse the internet smoothly.

If you can’t find the exact options I mentioned in your settings screenshots, just tell me what menu names you see (like "Settings 1 has options for Wireless Parameters, Network Setup, etc.") and I’ll help you pinpoint the right spots.

备注：内容来源于stack exchange，提问作者Mousin Ahanger