If you want to test your Samsung Galaxy, you can do this with the Service Test menu.

There are two Test menus.


  1. From the dialer app enter this code: *#7353# Now you can check the Light and Proximity sensors, Accelerometer, Touch screen, Main Camera and so on.
    • From the dialer app enter this code:

    • *#7353#

    • Now you can check the Light and Proximity sensors, Accelerometer, Touch screen, Main Camera and so on.

  2. Enter this code: *#0*# This menu is similar to the previous one.
    • Enter this code:

    • *#0*#

    • This menu is similar to the previous one.

    Bonjour qu1nd je tape le code *#0*# ça me dis “place open book cover” je ne comprends pas je suis sur un galaxy a3 2017

    Guillaume - crwdns2853112:0crwdne2853112:0

    Punya saya gak kenak kalau pakai kode *#0# knpa ya kalau selain kode itu bisa semua

    asarimalang35 - crwdns2853112:0crwdne2853112:0

    This will only work with the Samsung Android on the phone, not with an alternative OS.

    andy - crwdns2853112:0crwdne2853112:0


To reassemble your device, follow these instructions in reverse order.




183,565 crwdns2915208:0crwdne2915208:0



Master Techs crwdns2886886:0Master Techscrwdne2886886:0





I have a5 2016 sm5100 .....and codes are not work why????

sweetktz789 - crwdns2853112:0crwdne2853112:0

Doesn't work. These "tutorials" are always bullshit.

Fred - crwdns2853112:0crwdne2853112:0

They worked for me

Lisa Treadway -

Hello! I got weird error for *#0*#. I entered it and i got message like: " Plase Open Book Cover." Not "Please..." either. Can you help me? I would really appreciate your help and work. Thank you.

Nokia Lumia 620 - crwdns2853112:0crwdne2853112:0

You upgrade to Android 7 and the *#0*# goes bye bye. Don't know why, but it does.

Michael Justin -

I am having the same issue “plase open book cover “ And my phone is already updated to Android 7. Further my sim jacket broke down and I opened the phone and later the hands free didn't work as well as *#0*# shows the plase open book cover. What should I do now?

mirza ali -

if u r having mobile cover on the mobile , just remove it and try code *#0*#

Gulshan Yadav - crwdns2853112:0crwdne2853112:0

It works !!! Thanks !!!

Just remove de cover on the back !!!

anghel_80_ovidiu -

I was concerned about the accuracy of the touchscreen on my Samsung Galaxy A5 2017 with Android 7.0 . I did both of these tests and both confirmed that the screen was very accurate indeed. Many other tests are also available to test just about every sensor, input and output on the phone. I am very pleased with these findings. Many thanks to the people who brought this to light!

Thys Pretorius - crwdns2853112:0crwdne2853112:0

Hello Gents

Would anyone please post act. part number for Magnetic Sensor Samsung A5 SM-520F

Many Thanks

Michael M - crwdns2853112:0crwdne2853112:0


the code *#0+# works only until android 6.xx on samsung galaxy s6 edge !! On Android 7.0 is not working anymore ! you got a message " please open book cover " but that is a wrong message because the code is not working on Android 7.0 !! Another code is *#7353# test menu hardware !


murrx - crwdns2853112:0crwdne2853112:0

the first code did work thanks

Abuzar Ali - crwdns2853112:0crwdne2853112:0

Worked for me although I didn’t understand exactly what some of them were checking, but hey-ho I’m not a phone engineer.

tanto65 - crwdns2853112:0crwdne2853112:0

Thank You, was problem with cover. it was a film on the Display. I just needed to remove it.

C Jess - crwdns2853112:0crwdne2853112:0



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