D-Link DWR-921 Router: Internet Configuration Issues with PLAY Network in Urban Area

Hello.

I have a problem with the D-Link DWR-921 router configuration.
Well, I launched and configured the network and the router worked 4 weeks ago. Later, I went on vacation from a place where it is difficult to reach and took the router with me to check if it works. He didn't catch the signal so I put it aside.

After returning home, I wanted to restart it, but here a problem arose. The red LED on the signal strength lights up / flashes on the router. It's hard for me not to have coverage almost in the center of a large city. I reset the router, went through the configuration process again, but the LED still flashes. In the router settings there is a button for searching the network by the router and here my surprise because the router does not find any network in range (I remind you I live almost in the center of a large city).

Maybe someone encountered a similar problem? Maybe someone has this router configured for PLAY and would be able to send some network configuration dumps? Maybe anyone knows what the network settings should be, maybe I run the data manually?

Please help.

First, transfer the card to the phone and check if it is "alive" - if it was prepaid, it could have expired.

If the OK card is in the router I suggest to restore the factory settings and do the configuration again.

The card is subscription-based and works in iPad. Reconfiguration (I've done 10 times) doesn't help.

For Play APN this is the internet and if there is coverage then DWR-921 should connect to the internet. Where does this historic DWR-921 come from?

The origin of the router is rather irrelevant here, because there was a time when it worked normally.

Antennas connected in a reliable way?

Depending on the operator, these routers have different FWs. In the configuration you need to choose the appropriate WAN port configuration, in your case the LTE / 3G modem plays the role of WAN. For this profile with the appropriate APN for Play, the preferred type of LTE or 3G network and should work. Requires 3G / LTE Play home network coverage if it is an internet subscription.