Instructions to get IMEI number for free on Gresso devices

How to find the IMEI code on Gresso devices for free using the secret codes of the operating system or through the device menu. Instructions for displaying the IMEI number on a Gresso smartphone or tablet to release it, report it or use the warranty.

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Gresso Radical R3 Gresso Radical R3
Gresso Radical R2 Gresso Radical R2
Gresso Radical R1 Gresso Radical R1