The mobile router's cellular WAN disconnects and cannot reconnect automatically

Zyxel_JoyLee

For initial troubleshooting, please try the following steps:

1. go to Network Setting > Broadband > Cellular WAN to enable the network monitoring feature.
   This will help detect connection stability issues.

2. Check 5G Band Support:
a. Verify with your ISP which 5G bands are supported in your area. Then,

adjustthe Cellular Band setting on your router from Auto to Manual, selecting

the specific band for improved stability.
b. Alternatively Check local 5G signal via nperf website

(https://www.nperf.com/en/map/AT/-/-/signal?

ll=47.71671679243703&lg=13.35000000000001&zoom=7)

Select the appropriate Country,City/ province,District and Carrier(Operator).

3. Check Cellular band signal quality

Metric	Value Range	Signal Level	Interpretation
RSRP	> -80 dBm	★★★★★ Excellent	Very strong signal; ideal for LTE connection
	-80 to -90 dBm	★★★★☆ Good	Stable signal; good performance
	-90 to -100 dBm	★★☆☆☆ Fair to Weak	Usable but may affect speed or stability
	< -100 dBm	★☆☆☆☆ Poor	Very weak signal; likely unstable or dropped connection
RSRQ	> -10 dB	★★★★☆ Good	Low interference; good signal quality
	-10 to -13 dB	★★☆☆☆ Average	Acceptable but affected by interference/load
	-13 to -15 dB	★☆☆☆☆ Poor	High interference; degraded performance
	< -15 dB	☆☆☆☆☆ Very Poor	Severe interference; high latency, dropped sessions
SINR	> 20 dB	★★★★★ Excellent	Excellent signal-to-noise ratio
	13 to 20 dB	★★★★☆ Good	Good throughput expected
	0 to 13 dB	★★☆☆☆ Average to Poor	Noticeable performance drop
	< 0 dB	☆☆☆☆☆ Very Poor	Signal buried in noise; very poor data performance
RSSI	> -60 dBm	★★★★★ Excellent	Strong total signal power
	-60 to -75 dBm	★★★★☆ Good	Acceptable signal strength
	-75 to -85 dBm	★★☆☆☆ Weak	Often indicates distance or indoor blockage
	< -85 dBm	★☆☆☆☆ Poor	Very weak; may result in disconnection

If the signal quality is too poor, it indicates that your device is located at the edge of the coverage area. It is recommended to improve the device placement or consider installing an external antenna.