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I bought the router last December. Worked perfectly. In February, the 4G connection was suddenly interrupted. Error: SIM defect. After the reboot, the SIM card was no longer recognized. Nether from the router nor from any other device. Simply killed. I got a new SIM card from my provider, problem solved. Now, two months later, the same problem. SIM not recognized. Testing with another SIM: Router works.

So the Archer MR200 is killing SIM Cards.

On the (german) forum on Amazon several customers reported the same problem:Is this a general problem with the the router? It is a modern one size fits all SIM (nano, micro, normal)...

The router is still under warranty. Exchange it? Or go to another brand?