If you are looking to enable Diag. port in Jio Qualcomm Keypad phones by flashing the latest flash file.
Then this process no longer works.
Earlier by flashing, Diag. port get enabled.
Note: You can buy Jio Battery with 3 Month Warranty at Minimum price as compared to the Market or Online rate.
We will guide you throughout the process which must be used to enable Diag. port in the latest Qualcomm Keypad Phones.
We had used F220b as an example which is powered by a Qualcomm processor.
1- First, replace the Loader file of new File to the old File.
2- Loader File for Jio F220b is under folder Boot_images > Build > ms > bin > 8909 > emmc
3- Copy all files from EMMC of the Latest File to the Old File.
Then use, the Old file to flash Jio F220b.
All Jio Keypad File can be Found at RepairMyMobile.
Process of flashing will be the same. It will enable Diag. port in the phone.