This is working for most of the android who has Cortex chipset processor in their device. I have tried personally in my Intex canvas Aqua Life III smartphone which is Cortex chipset enabled phone and this trick is working for me. let see �How to use Reliance Jio 4G Sim in 3G android mobile phone with cortex chipset processor�. In this Method you have to check your Device is Cortex chipset or not, for check what type of processor you are using install CPU-Z app. You must have atleast 4.4 Kitkat or more latest version to make Jio Sim Working.

Prerequisite

1. CPU-Z
2. Activated Jio Sim

Instruction

1. Install and open the CPU-Z App, Check what type of Chipset You have .
   
2. If you have cortex chipset (Like below Screenshot) follow the Instruction below
3. Now Dail "*#*#4636#*#*" in your Dailpad
4.  It takes you to Engineering or testing or Service mode.
   
5. Now click on the �Phone Information� and Hover to Set Preferred Network type.
   
6. Click that Dropdown a list of Option Shows and select "LTE/GSM/CDMA auto(PRL)".
   
7. Now Turn off your Device and Remove Simcards.
8. Insert Activated Jio Sim in Slot 1 and remains slot 2 empty.
9. Now �Switch ON� your device.
10. Still it shows emergency call in the network.
11. Go to setting>Cellular networks>Network Operator>Search Network.
    
12. Search in Manual you can find "LOOP Mobile 4G", if u didnt find that keep searching until find that before that turn ON Data Connection.
13. Select "LOOP  Mobile 4G" and now you can acess Jio 4G in your 3G.
14. Enjoy your 4G in 3G android Mobile.

Trick To Increase Jio 4G Net Downloading Speed .

Trick to Boost Jio 4G internet Downloading Speed .

• First of all Go to settings of your smartphone .
• Now in settings you will see Many options .
• Just tap on The Mobile Network settings :- 

• Now Tap on Jio 4G .
• After Tapping on that you will see 3 options .
• Tap on Access points names . 

• Now You will see a menu button . 
• Just tap on that and Choose Create New internet settings / or you can edit the existing settings
• Now you will see many options . 
• Just input the following settings :- 

Jio 4G High Speed Internet Settings :- 

• Name - JIO
• APN - jionet
• APN Type - Default
• Server - www.google.com
• MMSC - Not Set
• MMS proxy - Not Set
• MMS port - Not Set
• MCC - 405
• MNC - 858
• Bearer - LTE
• Authentication Type - NOT SET 
• APN protocol - IPV4/IPV6

Now just Tap on Menu button and Choose Save . 

After saving reboot the Device , Thats all you have successfully Increase Jio internet speed .

Related : How to Use Jio Sim in 3G Mobile .

Set Preferred Network As LTE Only :- 

In this method we will Set 4G only method as our Preferred network method , By doing this you will be able to increase Jio internet speed . There are many devices which set networks automatically which leads to Slow internet speed . So here is the method to use LTE only as Preferred Network type :- 

• First Of all Insert the JIO Sim card in 1st slot .
• Now reboot your smartphone .
• Now Go to the Dialer app and Dial *#*#4636#*#* .
• Now you will see 4 options .
• Tap on Phone 1 information .

• Now you will get a option to Change the Preferred Network .

• Now open the Setting and Tap on LTE Only option .
• Now go back and just reboot your smartphone .

Thats All !! You have successfully increase the Jio 4g internet speed .

Alternate method :- 

• Go to the settings .
• Now open Sim cards and Mobile network settings .
• Now tap on JIO 4g .
• Now again you will 3 options .
• Tap on Preferred Network type .

• Now just tap on LTE only .
• Now again reboot your smartphone .

Thats All !! This was the Second method to Increase net speed in jio 4g .

How to Increase Jio 4G internet speed in android .

This third method is the most simple method . In this method to increase Jio net speed we have to remove the Download Size limit by going in to settings . By doing this you will remove the Limit and it will definitely increase Jio 4g speed .

• First of all go to Downloads app in your android phone .
• Now tap on Menu .
• Now find settings of the app .

• Now open settings . 
• In settings you will get a option " Download Size Limit " .

• Just change the Size limit to Unlimited .

• Now tap on save . 
• Thats all !! this was the Third method to increase Jio 4g internet speed . 

Additional :- 

It is recommended to refresh the network every 2 hours . To refresh just reboot your smartphone in regular interval of time .

Sometimes we use a lot app and the apps keep running in the background . These apps are also one of the main reasons behind slow internet connection speed . So it is recommended to force close all apps and then use internet . 

So this was our guide on How to Increase Internet speed in Jio 4g , I hope the trick to get High downloading speed in JIO 4g sim helped you .

Trick to Use Jio 4G Sim in any 3G mobile phone . 

Use Reliance Jio 4G Sim in 3G Phone .