Software issue, SIM card not inserted error.

Maksad

17 hours ago

Posts: 1

Helpful: 1

Solutions: 0

Stories: 0

Registered: 2026-04-06

Software issue, SIM card not inserted error.

17 hours ago

Tags: #Firmware Update #Network Connectivity

Model: TL-MR6400

Hardware Version: V5

Firmware Version: 1.9.0 0.9.1 v0001.0 Build 260108 Rel.60787n TL-MR6400 v5.3 00000002

TL-MR6400(APAC) v5.30. I had old software on my PC. I downloaded the new software from the TP-Link website. I installed it via the web interface. Then it gave a "SIM card not found" error. The SIM card is no longer being read. The ISP is gone. I want to revert to the old version, but it keeps giving me an error. It constantly gives "error:1" and freezes. We need to find a solution to this.

1 Reply

David-TP

2 hours ago

Posts: 18188

Helpful: 2706

Solutions: 3166

Stories: 9

Registered: 2020-04-14

Re:Software issue, SIM card not inserted error.

2 hours ago

@Maksad

Hi, welcome to the community.

May I know how long you've had the router?

Is the original firmware before upgrade 1.6.0 0.9.1 v0001.0 Build 230418 Rel.34085n?

Have you tried to hardware reset the MR6400 by holding the reset pinhole/button until all lights turn on, then off once?

It would also be very helpful if you could test the router with another SIM card to see if the error " SIM card not found "repeats again.

Wait for your reply.

Best regards.

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Software issue, SIM card not inserted error.

Software issue, SIM card not inserted error.

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