On June 1, 2021, 2 months back I bought the Tp-Link TL-MR100 4G LTE router on Amazon.

Today I found out that one of the two antenna ports ( left one ) of the router is not working. It must be defective since start but I noticed it when i tried install an external antenna. I attached photos to show signal strength when antenna connected on left and right sockets. As you can see left antenna pin is not working.

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I request you to resolve the problem as the warranty was there for the product upto 3 years. I look forward to your reply and resolution of my problem as soon as possible.