Technoglitch
Core Member
Ads inserted by MTNL have typically been for their own services, and have identified my landline number in the message delivered to me.
– Ads have popped up on both the desktop and mobile, but always in browsers. On mobile, it’s particularly irritating since it’s difficult to cancel the ads.
– In a few cases, they have been for value added services (called BBVAS) such as anti-virus tools.
I’ve been regularly taking screenshots of these ads. Some samples from my Internet browsing over the past year, where MTNL ads have popped up, on TechCrunch, Naukri.com, MediaNama, The Indian Express, Hindu BusinessLine, Flipkart:
These advertisements were being pushed via a service called Adphonso, and this post has more details, and indicates how these ads can be blocked. Wish I’d read it earlier, but frankly, it’s cumbersome for me to block these advertisements on all devices, especially the mobile. Each time I add a new device, will I have to figure out how to block ads from my ISP?
It isn’t just Airtel: MTNL has also been inserting Javascript into Internet connections - MediaNama

never expected this from Govt. firm 