It’s important for you know what the IMEI of your Samsung Galaxy Note 4 is, as this number is a serial number that will allow the smartphone to be identified correctly. For those that don’t have an amazing memory, it’s recommended that you write down the IMEI of your Samsung Note 4 after the purchase. This will allow you to prove that you own the smartphone in case the Note 4 gets stolen and you want to retrieve it back.
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Recommended: How to check Samsung Note 4 IMEI is valid and not stolen 
The IMEI or International Mobile Station Equipment Identity is a unique number for each device to identify it. The IMEI number is used by GSM networks to check if devices are valid and the Samsung Note 4 is not stolen or blacklisted. Completing an IMEI number check for Verizon, AT&T, Sprint and T-Mobile will make sure that Note 4 is usable. The IMEI number of your Samsung Galaxy Note 4 can be found with this three methods:
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Find out the IMEI via the Android system
To find the Samsung Note 4 IMEI from the phone itself, you need to first turn on the Note 4. Then once you have gotten to the home screen, go to the phone settings. Then select on “Device Information”, and click on “Status”. Here you can see various information entries of your Samsung Galaxy Note 4. One of them is “IMEI”. You’re now seeing your IMEI serial number.
Show IMEI via service code
Another way you can locate the IMEI number on your Note 4 is by using a service code. To do this, you need to first turn on the smartphone and go to the phone app. Once there, type in the following code in the dialer keypad: *#06#