Airtel — Sim card is not showing Invalid Sim

Dear Sir/ Madam,

Greetings,

My name is Ms. Mayuri Shankar Koli. I've been holding a same sim card for the past so many years. And since last night it's showing an INVALID SIM.

Request you to look into it and solve the issue as soon as possible, as I could not make my bank transactions. However I'm outside of the country, that's the reason I'm writing this mail.

Thanks in advance.

Regards,

Ms. Mayuri Shankar Koli