Here I have Katel PRS-15 and let me show you how to use secret codes on the following device
So at the very beginning let's start by using your home screen. Let's open the phone's dialer and here let's activate keypad and let's use the following
secret code. So let's input star hash, star hash, 225, hash star, hash star
As you can see the calendar information just pops up in front of you. So you can read the information about your contacts, your holidays and other stuff
Let's go back, let me open the keypad one more time and this time let's open Google
Play Services mode so let's use star hash, star hash, 426, hash star, hash star
As you can see Google Play Services just pops up so now let's read the following info and
then let's go back. After all you can also open debug UI so let's use star hash, star hash, 759, hash star
hash star. And that's it, the debug UI pops up, here you can change OEM mode, you can view client's
IDs, perform the ping test and other stuff. Let's go back by using your back key and at the end let me show you how to check the email
number by using the secret code. So let's use star hash, 06, hash and as you can see the email number just pops up
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