@Jitheshvaz Are you updating the beta firmware for the MR6400 v5 in the thread we provided? TL-MR6400(EU)_V5:...

@Maksanse Good. The support engineer will contact you soon, please pay attention to your email box.

@Dr.Mandeep Is it possible to test the SMS feature with another SIM card, like Airtel? Can we have and sys log on the MR100, especially about the SMS feature?

@JagdishDudhate To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.

@Maksanse Yes, that's a lot better, thank you. Please check and update both the router and extender firmware to the latest, and we will follow this up via email later.

@crgarcia Please verify its hardware version on its bottom label, then download the firmware from the TP-Link official website: https://www.tp-link.com/support/download/archer-mr400/v4/#Firmware...