Step-by-Step Guidance of How to Use 4G Sim in 3G Phone

author Mayank Content Writer

Everyone is taking advantage of 4G Reliance Jio SIM in 3G smartphones. Are you? Without any shadow of a doubt, the 4G Jio SIM is best in terms of speed and connectivity. So, if you are looking for a solution of how to use 4G SIM in 3G Phone, this article will help you. 

Before Jio stepped in, it was a bit challenging for everyone to access a high-speed network. But if you buy a 4G SIM, that does not mean you need to purchase a 4G mobile phone. 

There are some ultimate tricks available to do the process of using 4G SIM in a 3G smartphone. 

After exhaustive research, I found some of the best solutions for this process. All you need to do is just read out the article till the end. 

You can also read: How to Activate Vi Sim?

how to use 4G SIM in 3G Phone

Methods of How to Use 4G Sim in 3G Phone

First off, make sure your SIM is activated. I have shared some of the best methods, so read every method if you want to know how to use JIO SIM in 3G phone.



Mediatek Processor


Redmi Mobile


Switcher & Xorware


Qualcomm Chipset Devices

Mediatek Processor Method

Before I start this process, let me tell you that you need to see whether your mobile has a MediaTek chipset or not. Now, read out the steps of how to use 4G SIM in 3G Phone via the Mediatek Processor Method:

  • Your first step is to download and then install the MTK Engineering Mode app on your 3G smartphone.

  • The application will let you run an advanced Setup through the Engineering mode menu of MTK phones.

  • Open your installed app now. 

  • Your next step is to dial your mobile device-specific code for Engineering Mode.

  • Tap on MTK Settings and then the "Preferred Network" option.

  • You need to select these network modes now: 4G LTE/WCDMA/GSM.

  • Save these network modes and turn them off on your mobile device. 

  • Your next step is to shut your device and insert Reliance Jio 4G SIM in 1st slot. (Make sure to keep 2nd slot empty)

  • After you switch on your device, you will see the Jio SIM network.

Redmi Mobile Phone Method

This is something interesting! If you are curious to know how to use JIO SIM in 3G phone android like Redmi, follow the steps given below. 

  • Type this number on your Dial pad: *#*#4636#*#*

  • A testing page will appear, so choose Phone information.

  • Scroll down below and click on the set preferred network type.

  • You need to select the LTE/GSM auto (PRL) option.

  • The process is completed successfully. 

Facing No Network Signal or Emergency Calls Problem? Follow these steps to Enable a 4G network in 3G mobile:

  • Go to the Settings option, and then click on Mobile Networks. 

  • The second step is to go to Network Carriers and manually select networks. 

  • It will highlight Reliance 4G network signals in your area; tap on that.

  • If there is an error like "can't connect to this network", wait for some time. It will do everything through automatic registration.

Switcher and Xorware Method 

Do you know how to use your 4G SIM in your 3G mobile phone via Switcher and Xorware Method? If not, the below steps will definitely help you-

  • First is to download Xorware 2G/3G/4G Switcher & Xorware 2G/3G/4G Interface App.

  • The second step is to open your application and select Network Settings.

  • The third step is to select the network mode for 4G LTE.

  • Tap on "Apply" now and make some changes.

  • Switch off your smartphone and insert your Reliance Jio 4G SIM.

  • Turn on your device now, and you can use your Jio 4G SIM in 3G mobile. 

Must Read: How To Deactivate Jio SIM?

Qualcomm Chipset Devices Method

Before we learn this method, a user needs to check mobile specifications. See if your device has a Qualcomm Chipset or not. Also, Version 4.4 Kitkat Android devices will be acceptable. 

  • Download, install, and open the Shortcut Master (Lite) App.

  • Go to Menu and search "Service Menu" or "Engineering Mode".

  • After you get the Engineering Mode, open and select "Change LTE bands."

  • If it does not work correctly, dial *#2263# and select Menu. 

  • Click Back again and then tap on Menu again.

  • Go to key input and enter 0000.

  • A Popup will appear on your screen; click on UE Settings. 

  • Tap on settings> Protocol>NAS>Network Control>Band Selection>LTE Band>.

  • Select Band 40 now.

  • Switch off your phone and Insert your JIO SIM in the first SIM slot.

  • Open your device, and you can see a 4G SIM running successfully on your 3G mobile. 

How to Activate Jio 5G on an Android phone?

I believe you should also know about the activation process of JIO 5G on an Android smartphone. Let's dig in-

  • Go to your Phone Settings and click on "Mobile network".

  • Choose your JIO SIM and click on the 'Preferred network type' option.

  • The final step is to select 5G.

How to Activate Jio 5G on iPhone?

  • Go to the Settings option and click on "Mobile Data".

  • The second step is to go to "Voice and Data".

  • Tap "5G AUTO" and "5G Standalone On", and then it will connect to 5G.

Steps to Activate Unlimited 5G in Jio on Android

Are you curious to know how this 5th-generation mobile network in JIO can activate on Android? If the answer is yes, read out the points below-

  • Go to the Settings app and find the mobile network option.

  • Tap on JIO SIM on which you want to start 5G.

  • In the selection table, you will see the 'preferred network type' option.

  • Select the 5G option now.

  • After completing the steps, you will see a 5G symbol on the status bar. It means 5G services are now active on your Android smartphone. 


In this article, I have covered the best tricks of how to use 4G SIM in 3G Phone. Now, you don't need to buy a 4G mobile phone to use a 4G SIM. I have shared four methods, so you can use any of them as per your choice. The article even unpacked the best ways to activate unlimited 5G in Jio on Android and how to activate Jio 5G on iPhone and Android. Still more questions? You can drop it in our comment section.


Q1. Can I use 4G Jio SIM in 3G phone?

A1. You can use 4G Jio SIM in your 3G phone by using methods like Mediatek Processor, Switcher & Xorware, and Qualcomm Chipset Devices.

Q2. How can I activate my 3G SIM to 4G?

A2. It is easy to upgrade your 3G SIM to a 4G SIM. You need to visit the nearest Dialog experience centre or Retailer outlet. 

Q3. How can I convert my 3G phone to 5G?

A3. Go to Open Settings> Network & Internet> SIMs> Preferred network type>Choose 5G.

Q4. How do I know if my SIM is 3G or 4G?

A4. Many SIM cards will have a label on them, and that will let you know the type of network. 

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