1. Verify water damage
You should never buy an iPhone that has suffered water damage, it may degenerate later, even if it appears to the purchase function properly.
How to check water damage, there are many water sensors on iPhone and two of them can be seen without opening your iPhone. One is within the hole of the jack, and the other is the receiver in the charger.
In fact, they are as thin as paper white and turn pink / red when they come into contact with water.
2. Verify the IMEI number
IMEI is the identity card of the mobile. It is a unique 15-digit number assigned to each mobile phone. Whenever you buy used mobile (iPhone or otherwise) then you should check if it has a valid IMEI number.
How to get the IMEI number of the iPhone
Method 1: Go to the iPhone app Phone and dial * # 06 # as soon as you dial a 15-digit number is displayed.This is the IMEI number, write it down.
Method 2: Go to Settings, General, About and scroll down and you will find the IMEI number. Once you have the IMEI number, go to this site www.imei.info and enter IMEI number and click verify. This will give you information about your iPhone. If you find incorrect information, then you should not buy the iPhone.
Note: If you have the box with the iPhone, you can also match the IMEI number written on the box with the phone.
3. Verify Speaker Volume
Go to Music> All songs and play any song from your music library with volume is at maximum. Listen 2-3 different songs to see if the sound changes when you switch songs strong / fast and slow sweet songs. If the sound is good and loud enough, is that the speaker is good.
4. Verify touchscreen
The best way to check the touchscreen is by downloading the free application Studio Paint and color the entire screen to see if all parts of the touch screen function. If you do not have internet connection and you can not download the application, then another excellent way to check the touchscreen is opening the search service (shift to the right of the screen) and pressing all the buttons on the keyboard to see if this works touch area.
5. Verify the physical buttons and vibrate mode
You should check the Home button, power button, volume buttons and vibrate switch.
6. Functions tester
Do not take a risk, take a few seconds to check the camera and see if it works correctly. Click some pictures and see the quality of the picture, check the Auto Focus. If your device has a front camera, switch between front and back repeatedly. Switch to video mode and control functions. If your iPhone has a flash so do not forget to check if it works.
7. Testing wireless
Sometimes iPhones have problems with WiFi and other wireless connections. So if you have access to WiFi, do not forget to check if it connects properly. Insert your SIM card and see if it accesses the cellular network without any problem.
8. Verify if the iPhone is unlocked
Just go through this tutorial and enter your IMEI number. It will let you know if your iPhone is unlocked or contract factory locked. It is good to buy factory unlocked iPhone, but if you're ok with contract lock ite then your wish.
9. Verify bill and accessories
Before buying iPhone, check the accessories you get with (headphones, USB cable, etc..) Check condition and are operating properly. Also check the invoice (invoice) This will ensure that the iPhone is not stolen.
10. Check the general condition
Check if the body is not damaged iPhone, especially on the edges. Check the scratches on the body and screen. Also look closely for dead pixels on the screen. This section includes an audit of the entire outer body of the iPhone.
11. Verify sensors
Each iPhone is equipped with some sensors that help improve the user experience. Some sensors are
Light sensor (all iPhones)
Accelerometer (All iPhones)
Compass Sensor (3GS, 4, 4S, 5)
Gyro sensor (4, 4S, 5)
Light sensor changes the screen brightness depending on the environment you are, if you're in a dark place while the light sensor automatically adjusts the brightness of the screen. The accelerometer is used to switch from potrait to landscape mode, you can check this by going to the sensor images, then turn the screen. To check the sensor Compass, just go to the compass application pre-installed.
12. Verify the age of the iPhone, and lifetime of the battery
It is important that you know what is the age of the iPhone you buy. You can confirm the date of purchase by seeing the invoice of the product. If you can not then you should also check the life of the battery .
If you need assistance or additional information about this article, or just to leave a nice message to the editor, do not hesitate to leave your comments!
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