Method 1: SN Write Tool

Md1 Db And Ap Db Files Lenovo K4 Notebook
Md1 Db And Ap Db Files Lenovo K4 Note 8

NVRAM files extensions called APDB and BPLGU only can load on with this.

Now browse the 2 DB file under MD1DB usually named BPLGUInfoCustomAppSrcPMT65. and APDB usually named like APDBMT65. browses them one by one from the firmware folder. Now click save and in the SN Write tool Home screen Click on Start. In the “Database File” section, add “MD1DB” and “APDB” (both files are supplied with the firmware of your device/Download From above). Then Click on Save and then Click Start. Now in the “ Scan Data ” section, enter IMEI1 and IMEI2, Bluetooth address, Wifi address and click “OK”. At the bottom, you will see two options such as MD1DB and APDB. Select the first option and select the MD1DB file of your mtk device. Repeat this step for APDB. Now hit the save button. Next step is to hit the start button. In the next window, enter the imei address, bluetooth address and wifi address of your mtk phone.

This tool does not support other extensions like SPNV, TAR or Bin. These are a different backup and other tools can handle and support.
The SN writer tool as far as my experience is working on a Windows Operating System and support MediaTek Chipsets.
I give basic steps on how to use this tool.
Step 1 . Download SN Writer Tool below and extract it to your Computer.
Step 2 . Run the SN writer.exe
Step 3 . Click on the comport. select USB VCOM
Step 4 . In the target Type option, Select Smartphone or Feature phone
Step 5 . Click the System Config, There is configuration IMEI, Bluetooth, Wifi. Make it select these 3
Md1 db and ap db files lenovo k4 note 7

Step 6 . Select IMEI option Dual SIM if your device is Dual SIM.
Step 7 . In under Database File, Browse the NVRAM Firmware you download for your device
MD1_DB is for (AppSrcP BPLGUI) and AP_DB is for APDB
Example :AP_DB is for file APDB_MT6572_S01_ALPS.JB3.MP
MD1_DB is for file BPLGUInfoCustomAppSrcP_MT6572_S00_MOLY_WR8

Step 8 . Click now the save button and Scan data appear to write an IMEI, WIFI, Bluetooth and click OK and Start Button

Step 9. Connect Phone to a USB port of PC in power off mode and plug-out the battery or boot to Meta mode.

Step 10. After writing IMEI, You will see Green Pass prompt. and your job is Done.

Other Steps and what PC driver you need.

Be sure you have Driver CDC Gadget Serial installed to your PC There is the Advance connection in Option which is connected to operate on META or AT. You can download Meta driver and Mediatek CDC VCOM ADB BROM preloader HERE.

If you want to know more how to installed manual driver of most MediatekHERE.

Version Download credits to snwritetool.com

SN_Write_Tool_v1.1528.00.zip
Method 2: Maui META MTK 3G
The package contains tutorial and video how it works to write IMEI to phone.
Download Package below
MauiMETA MTK exe_3G_v8.1520.0

Brand Brand name of the company that manufactures the device.	Lenovo
Model Model name of the device.	K4 Note

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width Information about the width, i.e. the horizontal side of the device when it is used in its standard orientation.	76.5 mm (millimeters) 7.65 cm (centimeters) 0.251 ft (feet) 3.012 in (inches)
Height Information about the height, i.e. the vertical side of the device when it is used in its standard orientation.	153.6 mm (millimeters) 15.36 cm (centimeters) 0.504 ft (feet) 6.047 in (inches)
Thickness Information about the thickness/depth of the device in different measurement units.	9.15 mm (millimeters) 0.915 cm (centimeters) 0.03 ft (feet) 0.36 in (inches)
Weight Information about the weight of the device in different measurement units.	158 g (grams) 0.35 lbs (pounds) 5.57 oz (ounces)
Volume Estimated volume of the device, calculated from the dimensions provided by the manufacturer. Applies for devices in the form of a rectangular parallelepiped.	107.52 cm³ (cubic centimeters) 6.53 in³ (cubic inches)
Colors Information about the colors, in which the device is available in the market.	Black White
Body materials Materials used in the fabrication of the device's body.	Polycarbonate

SIM card type Information about the type and size (form factor) of the SIM card used in the device.	Micro-SIM (3FF - third form factor, since 2003, 15.00 x 12.00 x 0.76 mm)
Number of SIM cards Information about the number of SIM cards, supported by the device.	2
Features Information about some specific features related to the SIM card(s) of the device.	Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSM GSM (Global System for Mobile Communications) was developed to replace the analog cellular network (1G), therefore it is referred to as a 2G mobile network. It has been improved with the addition of General Packet Radio Services (GPRS) and later via the Enhanced Data rates for GSM Evolution (EDGE) technology.	GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz
UMTS UMTS stands for Universal Mobile Telecommunications System. Based on the GSM standard, it is deemed as a 3G mobile network standard. It has been developed by the 3GPP and its major advantage is the provision of greater bandwidth and spectral efficiency, due to the W-CDMA technology.	UMTS 850 MHz UMTS 900 MHz UMTS 1900 MHz UMTS 2100 MHz
LTE LTE is deemed to be the fourth generation (4G) of mobile communications technology. It has been developed by the 3GPP based on the GSM/EDGE and UMTS/HSPA technologies in order to increase the speed and capacity of wireless data networks. A further development of the technology is called LTE Advanced.	LTE 800 MHz LTE 850 MHz LTE 900 MHz LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41)

Mobile network technologies

There are several network technologies that enhance the performance of mobile networks mainly by increased data bandwidth. Information about the communication technologies supported by the device and their respective uplink and downlink bandwidth.

UMTS (384 kbit/s )
EDGE
GPRS
HSPA+
LTE Cat 4 (51.0 Mbit/s , 150.8 Mbit/s )

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS) Information about the operating system used by the device as well as its version.	Android 5.1 Lollipop Android 6.0 Marshmallow
User interface (UI) Name and version of the user interface (UI) used by the operating system (OS).	Vibe

SoC The SoC integrates different hardware components such as the CPU, GPU, memory, peripherals, interfaces, etc., as well as software for their functioning.	MediaTek MT6753
Process technology Information about the process technology used in manufacturing the chip. The value in nanometers represents half the distance between elements that make up the CPU.	28 nm (nanometers)
CPU CPU is the Central Processing Unit or the processor of a mobile device. Its main function is to interpret and execute inst

Md1 Db And Ap Db Files Lenovo K4 Note