I am able to reach support person, he provided a workaround . He asked me to fine out "Message Center Number" from mobile with same sim. I updated same message center number in "Advanced>SMS>SMS...

@DeepVns Made a call to hotline after 15 min wait time. Call got disconnected ;).

@DeepVns Thank you. It seems they are not paying attention for support. All agents are busy for voice call . sent a mail to support.in@tp-link.com

How many months we need to wait for solution. is it software problem, hardware or confifuration problem?

tried to reach TP link people .https://livechat.tp-link.com/in/routers/. no use

Same issue with Hardware Version:Archer MR600 v1 00000001 It seems we are not getting enough support from this forum.is there any other way to reach tplink support ?