The "ShowServiceMode" is an application to be able to call "Secret Screen" quickly which are provided as standard maintenance menu. Has been primarily developed for the Samsung Galaxy. It does not feel good to change the settings. But you want to change the settings?
This download is completely secure. Jaken's laboratory is the creator of this application which can be found in the Tools category. The developer released a new version of ShowServiceMode For Galaxy LTE on Jan 28, 2014 and over 10K users downloaded and set up the app.