This tutorial simple if you better understand and one way for better understand tutorial simple before use first read all are content carefully then following step by step you are done easy without any issue, if you have samsung device A7 all variants and need to unlock just don't worry following step by step why need to root device ? because if you have out country device then you insert your own country sim card then device asked insert unlock code so if you want to unlock device then first need to root device without root device you can't unlock it so this is simple way for root here put simple tutorial for better understand but must remember before use this tutorial must charged your battery up to 80% after try to unlock also must be working well micro usb cable or must be installed driver in your computer or laptop.
Download Link
Twrp_3.0.0-0_sm-a710f.tar Download
HERESupersu.zip Download
HERESamsung Galaxy A7 SM-A710F/FD/Y/M Driver Download
HERERequired for Root:
1. Samsung A710F device with good battery charged
2. Twrp_3.0.0-0_sm-a710f.tar
3. Supersu.zip
4. Odin
5. Driver (if not installed in your computer or laptop)
Procedure:
1. Download all are required from above link
2. Extract to desktop or as you like path
3. Open Odin flash tool
4. Click on AP option and choose twrp_3.0.0-0_sm-a710f.tar file
5. Press and hold Volume Down + Home + Power button (for Download Mode)
6. Insert usb cable to device
7. Click on Start button
8. Wait until full flash
9. After Full flash unplug device
10. Take out battery into device and insert again battery into device
11. Copy UPDATE-SuperSU-v2.65-20151226141550 folder into SD Card
12. Insert SD Card to device
13. Press and hold Volume Up + Home + Power button for recovery menu
14. Choose Install zip from SD Card
15. Choose Pasted UPDATE-SuperSU-v2.65-20151226141550 file and install it
16. After installed reboot device
17. Congratulation you are done
Samsung Galaxy A7 SM-A710F/FD/Y/M Recovery flash screenshot: