What are the correct specs of Tecno W3 smart phone?

I would like to by Tecno W3 smart phone (Android 6.0 Marshmallow). I googled to know its GPU. Some websites said it's **Mali-400 GPU** such as: 1. http://bestmobs.com/tecno-w3/ 2. http://naijaquest.com/tecno-w3-specs-features-reviews-and-price-official/ And other websites said it's **Mali-400MP2 GPU** such as: 1. http://www.androidphonesinnigeria.com/tecno-w3-full-specifications-features-price/ 2. http://www.droidafrica.com/tecno-w3-brings-android-60/ The official website of the phone does not give any information about the GPU nor the part number of the CPU IC. How can I know the real GPU when I test the phone at the shop? Is there an android test code? Thank you very much,