Tired of getting spammed with credit card offers, fake loans, and those sketchy investment tips you never signed up for? Me too. That’s why I wrote this guide—because I finally took the time to figure out how to stop spam messages once and for all using DND activation. And trust me, it works like a charm.
Whether you’re on Airtel, Jio, Vi, or BSNL, this article will show you how to block spam SMS without needing the sender’s number. That’s right—you don’t need to chase down shady alphanumeric codes like “AD-LOANS” or “VM-HLTHPK” ever again.
Key Highlights
What is DND Activation? Simple, free, and works across all Indian networks
Step-by-step guides for Airtel, Jio, Vi, and BSNL
Tips for Android and iPhone to double down on spam control
Real-life examples and insights from my own experience
Works even if you don’t have the sender’s number
What is DND Activation and Why You Need It
DND Activation (aka Do Not Disturb) is your first line of defense against the endless barrage of promotional messages flooding your phone. Think of it like putting up a digital “No Trespassing” sign.
I discovered it after getting 17 spam messages in one day (not even exaggerating). Some were about real estate projects I’ve never heard of. One offered a “guaranteed” loan with no documents required. Yikes.
So I activated DND on my number. The next day? Silence. Sweet, peaceful silence.
DND Activation blocks spam SMS from these categories:
Credit cards and loans
Real estate
Education and online courses
Health and wellness products
Entertainment and IT services
And the best part? It’s completely free and takes less than a minute.
How to Block Spam SMS on Airtel, Jio, Vi, and BSNL Using DND Activation
How to Block Spam SMS in Airtel
If you’re an Airtel user, here’s what worked for me:
- Send
START 0to 1909 from your Airtel number. This activates Full DND. - Want to block only certain categories? Send
BLOCK <category number>to 1909. - Example:
BLOCK 3if you’re tired of education-related spam.
You can also manage preferences on the Airtel Thanks app under Services > DND.
How to Block Spam SMS in Jio
With Jio, you’ve got options:
- SMS
START 0to 1909 - OR use the MyJio app:
- MyJio > Settings > Service Settings > DND
I prefer the app—it’s faster and gives you category-level controls.
How to Block Spam SMS in Vi (Vodafone Idea)
Here’s how I blocked those annoying loan schemes and real estate promos on my Vi SIM:
- Send
START 0to 1909 for full blocking. - For custom DND, send
BLOCK <category number>. - Or go online: https://www.myvi.in/dnd
Super easy and no need to download extra apps.
How to Block Spam SMS in BSNL
Old school but effective:
- SMS
START 0to 1909 from your BSNL number - You can also go to: http://www.bsnl.co.in/dnd
I used this on my dad’s phone, and it worked like a charm. No more Ayurveda product ads at 6 AM 
DND Categories You Can Block
If you don’t want to go full DND, you can pick and choose. Just send BLOCK <number> to 1909:
BLOCK 1– Banking, Credit Cards, InsuranceBLOCK 2– Real EstateBLOCK 3– EducationBLOCK 4– HealthBLOCK 5– Consumer Goods, AutomobilesBLOCK 6– Entertainment, ITBLOCK 7– Tourism, Leisure
So if you’re only annoyed by loan spam, just send BLOCK 1. Boom. Done.
How to Block Spam SMS on Android and iPhone (Bonus Tips)
Even after DND Activation, I still like to double up with device-level filtering.
How to Block Spam SMS on Android
Here’s what I use on my Pixel:
- Google Messages: Go to Settings > Spam Protection > Turn it ON
- Install Truecaller – it helps filter both calls and SMS
- Try SMS Organizer by Microsoft – it auto-sorts your inbox
Some phones (like Samsung) have their own spam filters too.
How to Block Spam SMS on iPhone
Apple keeps it clean:
- Go to Settings > Messages > Filter Unknown Senders
- Block specific numbers manually (annoying but helpful for persistent spammers)
- Tap “Report Junk” in iMessage when you get a spam text
How to Block Spam SMS Without Number
This is the magic of DND Activation. Most spam comes from senders like AD-BANK or VM-MEDIC, not regular numbers.
Your phone can’t block those easily—but your network can. That’s why DND works even if you don’t have the sender’s number. It blocks by category, not contact.
Final Thoughts: Spam-Free is the Way to Be
If you’re constantly wondering how to block spam SMS or your inbox feels like a digital landfill, DND Activation is your rescue button.
No more deleting texts from shady insurance companies.
No more wondering how your number got on every marketing list in India.
Just peace. And the occasional legit SMS you actually need.
Want to improve your overall SMS experience after blocking spam?
Check out this article on 10 Best SMS Apps for Android That Make SMS Interesting – it covers some of the top apps to enhance your messaging experience.
Send START 0 to 1909 today. You’ve got nothing to lose—and a clutter-free life to gain. 
Useful Links
- TRAI DND Registration Portal – official site for managing DND preferences
- Airtel Thanks App
- MyJio App
- Vi DND Page
- BSNL DND Portal
