Your smartphone has a hidden service menu. Enter this code to check battery and screen condition

Each smartphone, regardless of its brand and price, is simply a complex device that hides secrets in its software that is not available to the average user. 1 of the most interesting and most useful is hidden service menu – a powerful diagnostic tool utilized by technicians and servicemen. However, it turns out that access to this menu does not require specialized tools, but only entry on the telephone simple, secret code. Thanks to it, we can test in a fewer moments the key components of our device, specified as screen and batteryand besides check the correct operation of all sensors. This knowledge, which is invaluable not only in the assessment of the condition of our current phone, but especially erstwhile purchasing utilized equipment.

What is simply a hidden service menu and why does it exist?

The service menu, besides known as test or diagnostic mode, is simply a peculiar part of strategy software (most frequently in the system). Android) which is deliberately hidden from a average user. It was created by manufacturers for their interior needs – so that service staff could rapidly and efficiently diagnose which of the components of the telephone had crashed.

Thanks to this menu you do not request to install any additional, frequently paid applications. We already have all the essential equipment investigating tools built into our phone. Access to them is blocked by peculiar USSD codes (Trained Supplementary Service Data) that enter straight on the phone's numeric keyboard as if we were dialing a number.

Key code for full diagnosis: How to usage it?

The most versatile and feature-rich service menu has smartphones Samsung. The code that activates it has become almost legendary.

To activate the menu, follow the following steps:

1. Open Application Telephone (the number key you call from).
2. Enter precisely the following code: #0 # (star, cross, zero, star, cross).
3. You don't gotta push the green earpiece. The menu should appear automatic after entering the last sign.

After entering the code on the screen, a grid with buttons will appear, each of which is liable for investigating another component. Here are the most crucial ones:

• Red, Green, Blue: It's a basic screen test. erstwhile each button is pressed, the full screen will light up to a uniform, intense color. This allows you to diagnose immediately burnt or dead pixelswhich will be seen as black or glowing on a different colour dot.
• Touch: Absolutely key test erstwhile purchasing a utilized phone. A grid of squares will appear on the screen. Your occupation is to run your finger through all the fields. If either of them doesn't turn green, that means that in this place Touch panel is damaged And he's not responding to the touch.
• Sensor: Runs a comprehensive test of all sensors on the telephone deck. You can check here, among others. accelerometer (move reaction), proximity sensor (does the screen go out during a telephone call), gyroscope, barometer is light sensor.
• Receiver and Vibration: Simple tests to check the operation of the talker and vibration engine respectively.
• Mega Cam and Front Cam: Tests of the main and front cameras.

Universal Android code for battery checking and statistics

Unfortunately, the code #0 # is reserved mainly for Samsung devices. For another brands phones (such as Xiaomi, OnePlus, Google Pixel) there is another, more universal code: #4636 ##4636##.

The menu he calls is little graphic and more technical. We will not find here tools to test the contact screen, but we will gain access to another valuable information, including those concerning batteries.

• Phone information: You will find here, among others, the IMEI number, information about the power of the network signal.
• Battery information: This is the most crucial section. It displays parameters specified as battery position (its ‘health’), charge level, voltage and temperature. besides advanced battery temperature can indicate its wear or damage.
• Usage statistics: Interesting feature showing which applications have been late utilized and for how long.

How do I check my iPhone battery?

Apple telephone users don't gotta hotel to secret codes. The Cupertino company has built a very readable tool to measure battery position straight in the iOS strategy settings. To usage it:

1. Come in. Settings.
2. Go to section Battery.
3. Select Option Battery condition and charging.

You'll see there. ‘Maximum capacity’ expressed in percentage. The value of 100% means the battery in perfect condition. Drop below 80% is considered by Apple to be a signal to consider battery replacement as its performance is already importantly reduced.

The hidden service menu is an highly powerful diagnostic tool that will democratize access to the cognition of our device. It is absolutely invaluable with purchase of a second-hand phone. It allows in a fewer minutes, in front of the seller, to verify whether the screen has any defects, whether the contact works on the full surface, and the sensors function properly. It's the best way to prevent the acquisition of equipment with hidden, costly faults.

Note, however, that this is simply a service tool. If tests are available on the menu #0 # are full safe and non-invasive, but in the menu called code #4636 ##4636## there are advanced network settings. Accidental change of 1 of the parameters (e.g. preferred network type) can origin problems with the operation of the mobile net or making connections. Therefore, caution and usage of this menu is recommended mainly for diagnostic purposes, without changing any settings that we are not 100% certain about. Nevertheless, the very awareness of these codes gives us, consumers, a immense advantage and control over the technology we usage all day.