How to Quickly Switch Data SIM Cards on Your Android

Don't Get Stuck on the Wrong SIM Card: Here's How to Change Default for Mobile Data
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Are you tired of your smartphone automatically using the wrong SIM card for your mobile data needs? Have you ever been charged a hefty amount for accidentally using the wrong SIM card? Or want to switch data SIM.

Fear not, for we have got you covered! Get ready to take control of your mobile data and say goodbye to costly mistakes! In this blog post, we will show you how to easily change the default SIM card for mobile data so that you can stay connected to the world without any worries.

It’s a backdroid in this tutorial, and I will teach you how to change from SIM 1 to SIM 2 for data usage. 

One of our visitors asked how to switch my primary mobile data SIM to a secondary sim or change my preferred sim for mobile data. 

It shows the shortage of articles on the internet, so writing this piece of the article just for you encourages us.  

How to Switch or Change Data SIM Card

A default SIM card is the primary SIM card used for communication and mobile data when multiple SIM cards are inserted in a dual-SIM smartphone. When a dual-SIM smartphone is set up, the user can choose which SIM card to use for calls, messages, and mobile data. The default SIM card is the SIM card that the smartphone will use to make calls, send text messages, and use mobile data unless the user specifies otherwise.

  • Open the “SIM Card & Mobile Data” Tab in Settings

    First of all, you need to open the mobile settings. 

    At this point, you will see a tab for “SIM Card Setting & Mobile Data” Select this tab. 

  • Find Default SIM Settings

    A new window will appear very after scrolling down and finding the section of “default sim card settings.”

  • Tap on the SIM card to use its internet

    Here tap on the “mobile data sim.” This setting is for switching mobile data sim and the default calling sim card. 


With this method, you must select the SIM card whose “Internet” you want to use. 

If you have recharged your sim two and want to switch from SIM 1 to SIM 2, then this is the method you could use.

You could easily switch from this sim1 to sim2 as your preferred mobile data sim by selecting the same.

NOTE: More Screenshots of Android 13 and Samsung devices are shown below.

Moreover, if you want to switch back whenever you want to, suppose you have recharged again, but this time you have recharged in SIM 1; you can switch it by following the exact thing I should above.

Also read:

Apps Greyed Out on Android? Find Out the Surprising Fixes!

How to change the default SIM card for mobile data

best practices gif

Let me sum up everything in a quick three points method. Summarising is very important before you go anywhere. Read the summary, the essence of the article I wrote on “Mobile Data SIM Change.” 

  • How to change the default SIM card for mobile data
  • Open the “Settings” app on your dual-SIM smartphone.
  • Select “SIM cards” or “Dual SIM settings.”
  • Select “Mobile data” or “Data usage.”
  • Choose the SIM card you want to set as the default SIM card for mobile data.

Step-by-Step Guide, With Screenshots

connection menu in mobile settings
SIM manager setting highlighted
mobile data highlighted in sim card settings
switching between mobile data sim card
change mobile data SIM
switched to sim 2 for internet usage

Troubleshooting common issues with configuring default Mobile Data SIM card

There is no need to panic if you encounter common issues when configuring your default mobile data SIM card! Here are some tips to help you troubleshoot and get back on track:

  1. SIM card not recognized – Don’t be shy. Give your SIM card a wipe-down and double-check that it’s inserted properly. It might be time to replace it if it’s still not working.
  2. Unable to select default SIM card – Before cursing at your phone, check if both SIM cards are enabled and ensure you’ve activated dual SIM mode. If you’re still stuck, try restarting your phone or resetting network settings.
  3. Mobile data not working – Ah, the dreaded “no internet” message. First, ensure mobile data is enabled in your settings and you have a data plan with your carrier. Then, try manually configuring your APN settings (don’t worry, it’s not as scary as it sounds).
  4. Poor signal or slow speeds – When your internet crawls at a snail’s pace, it’s frustrating. Check for any network outages in your area and try switching to a different network mode (who knows, 5G will work better than 4G).

With these tips in mind, you’ll be able to overcome any common issues with configuring your default mobile data SIM card like a pro!


Above is the method or the summary of the whole article. This guide can be used for switching the default mobile data or to change mobile data from sim 1 to sim two or vice versa.

Here is the end of the article. Check out more tutorial articles—even some of the best mobile games

Don’t forget the encouragement that we recently talked about. It’s Me, Kunal signing out. Have a nice day.

Congratulations, you’re now a pro at switching data SIM cards on your smartphone! So go ahead and switch it up, and enjoy faster, smoother data on your device! With these easy-to-follow steps, you’ll never have to suffer through slow data again. Always be careful when handling SIM cards, and take time when configuring your default settings.

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Kunal Kashyap

Kunal Kashyap

Hey, It’s Kunal; I'm a professional writer and problem solver. I mainly write about Android OS, apps or games, or even tutorials to troubleshoot your errors and games. I’ve been making content since 2017. I started as a YouTuber now I’m a Blogger.

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