[Samsung Galaxy J3 (2017) Questions & Answers] KevMetal:
`*#*#7262626#*#*` – Perform a field test `*#2263#` - If previous doesn't work. Sadly, Samsung used to provide field test display by entering codes in keypad. **However, from Galaxy S3 onward, the service mode *#*#197328640#*#* was disabled.** Only *#0011# is still available. The worst is that even the android default testing info *#*#4636#*#* was disabled as well And just because this looked very sparse, here's a big list! For IMEI Number: *#06# <br> For RAM Memory version: *#*#3264#*#*<br> For FTA SW version: *#*#1111#*#*<br> For FTA HW version: *#*#2222#*#*<br> For Touchscreen version: *#*#2663#*#*<br> To test Bluetooth: *#*#232331#*#*<br> To display Bluetooth Physic Address: #*#232337#*#<br> To test secret GPS: *#*#1472365#*#*<br> To test other GPS: *#*#1575#*#*<br> To test WiFi/Wireless LAN of phone: *#*#232339#*#* or *#*#528#*#* or *#*#526#*#*<br> To display Wi-Fi MAC Address: *#*#232338#*#*<br> To test Vibration and Back-light of device: *#*#0842#*#*<br> To test Proximity/Distance Sensor: *#*#0588#*#*<br> To test Touchscreen: *#*#2663#*#*<br> For Audio Test: *#*#0289#*#* or *#*#0673#*#*<br> To launch Service Mode: *#*#197328640#*#*<br> Hidden Service Menu (Motorola Droid): ##7764726<br> Field Test: *#*#7262626#*#*<br> To format the phone: *2767*3855#<br> To Restore Factory Settings: *#*#7780#*#*<br> To create Immediate backup of your multimedia files: *#*#273282*255*663282*#*#*<br> To display Phone Information: *#*#4636#*#*<br> To get detailed Camera Information: *#*#34971539#*#*<br> For Software & Hardware Information: *#12580*369#<br> To display HSDPA/HSUPA Control Menu: *#301279#<br> To start GTalk Monitoring: *#*#8255#*#*<br> To get PDA, Phone, H/W and RF Call Date: *#*#4986*2650468#*#*<br> Displays Build Time and Change List number: *#*#44336#*#*<br> Packet Loopback Test: *#*#0283#*#*<br> LCD Display Test: *#*#0*#*#*<br> Enter Service Menu (on New Phones): *#0*#<br> Diagnostic Configuration: *#9090#<br> USB Logging Control: *#872564#<br> System Dump Mode: *#9900#<br> View Phone Lock Status: *#7465625#<br> Executes Emergency Dial Screen to unlock PUK Code: **05**#<br> Enables Voice Dialing Logging Mode: *#*#8351#*#*<br> Disables Voice Dialing Logging Mode: *#*#8350#*#*<br> Change behavior of Power button: *#*#7594#*#*<br>

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How did you use field test mode and fastboot? If you boot into fastboot you boot out of ftm....

I think you need you to make a video or take screenshot or at a bare minimum type out your methods step by step and throw in at least one screenshot so people can understand exactly what your saying & doing .

Which tablet EXACTLY ( brand , model , hardware)

Which OS version & security patch

HOW DID YOU ENTER FASTBOOT ON A SAMSUNG DEVICE ?

Which fastboot commands

! If you could boot into fastboot with your samsung device you could enable oem unlock feature after which you could run oem unlock command and flash images ....! This is not the case with a locked bootloader that doesnt allow unlocking ...with a code from samsung you could unlock the bootloader in fastboot with an official unlock code .

And so forth ...

I think if the "guy" who got root has credit then everyone should chip in a dollar to buy the unlock and share it with the world

If the "guy" is getting help on XDA and selling that info he deserves to get his work pIRATED too !

If it is a hoax it should be exposed to the community so he loses his credibility so he cant get rich scamming people with unlocks

I HAVE NEVER PAID FOR ROOT OR GSM UNLOCK . Those are basic consumer rights .

I admire your dogged determination to try anything under the sun but you should take a second to compare your results with your efforts and try to go from there .