How to Upgrade Airtel 3G SIM into 4G SIM [The Simplest Way]


Bharti Airtel is revamping its system to improve web speed and GSM/voice call quality. If you’re getting slow internet on your Airtel number, update it with a 4G SIM! If you want to update your 3G SIM into 4G, all it takes is a simple online request. Once submitted, Airtel will send out the new sim within 7 days at no additional charge.

You can change your Airtel 3G network into 4G in two different ways. The first is a free and quick online process that can complete within 7 days, or the second involves visiting the Airtel outlet store which will require you to pay a fee for it. In order to begin this procedure, visit Airtel’s website and click “Online Request For Migrate 4G SIM”

Step By Step Guide to Upgrade Airtel 3G SIM to 4G Online


Step 1: Open this URL in the browser. (

Step 2: Fill in the necessary detail including SIM Card delivery details and click Submit Button.

Step 3: Now, The Airtel SIM 4G SIM Card will be delivered to your home in 48-72 hours.

Step 4: Once your new 4G sim card arrives at your location, you need to follow the activation process to activate it.

Step 5: To activate your new 4G SIM Card you just have to send an SMS to 121 with your 20 digit New SIM number.

Step 6: Type in a message SIM<20-Digit Number> and send it on 121 from your New Airtel 4G SIM. The 20 digit SIM number is printed at the backside of your new 4G SIM card.

Step 7: You will receive a conformation message, reply 1 when you received that message.

You will have to wait a few hours for the procedure to be completed. When it is, your current SIM will stop working. If that occurs, insert the new 4G SIM card in your 4G device and wait for 12-24 hours, now, new 4G SIM will start working normally.

Note: For some user activation process can be as quick as a day, and for others it can take couple of days. While activation you existing SIM card will be active so don’t worry, once activation is successful your existing 3G SIM will be deactivated.

If you are having any issues with your new SIM or network, you should visit the Airtel store. Besides, you can contact Airtel customer care to resolve your issue.

How can I upgrade my Airtel 3G SIM to 4G by SMS

  1. Visit this URL above in your browser. (
  2. Simply fill out the necessary information and click Submit.
  3. You will soon receive your Airtel SIM 4G SIM card in next 48-72 hours.
  4. When your new 4G sim card arrives at your location, you will have to activate it.
  5. To activate your new Airtel 4G SIM card via SMS, type SIM<20 Digit New SIM Number> into the SMS text box and send it to 121 from your new Airtel 4G SIM. (The 20 Digit SIM number is printed on the back of your new 4G SIM card).
  6. If you receive a confirmation message, reply with number 1 when you receive it.

Can I upgrade my Airtel SIM to 4G myself?

Yes, you can upgrade your Airtel 3G SIM Card to 4G yourself, just follow the above guide to successfully upgrade your SIM to Airtel 4G without any errors.

What Documents required for Airtel 4G SIM Upgrade?

You don’t need any of your documents to upgrade your Airtel SIM Card to 4G, Unless the Existing SIM Card is deactivated for more than 1 week. If you SIM deactivated then you should visit your nearest Airtel Store.

Is it mandatory for everyone to upgrade from 3G to 4G Airtel SIM?

As you know today is the world of 4G Network, and now all latest mobile phone comes with LTE Support (ie, 4G Ready Smartphone) and most importantly 3G and 4G data plan are the same, so there is no reason to not upgrade to a 4G network. I recommend that everyone who is using a 3G SIM Card should upgrade to a 4G SIM Card.

Update: Bharti Airtel Builds a Future Ready Network so now you must upgrade your existing 3G SIM to Airtel 4G, for ease of users Bharti Airtel has introduced instant activation for Airtel 4G SIM Activation. It means if you buy or upgrade Airtel now, your number will Instantly activated.

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