How to Verify Apps Before Installing on Galaxy S4
You may harm your Android phone by installing apps from sources other than Play Store. On Samsung Galaxy S4, "Verify Apps" warn or block before ...
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Samsung introduced Galaxy S4 in two different models in international market. One is I9500 and the other is i9505. The only main difference is about CPU. I9500 is powered by a Quad-core 1.6 GHz Cortex-A15 & quad-core 1.2 GHz Cortex-A7, and I9505 is powered by a Quad-core 1.9 GHz Krait 300.
So, do as follows to see what S4 model you already have:
1. Open "Settings" App
2. Go to "More" Tab and find "About Device"
3. There you should see the "Model Number"
Read More Galaxy S4 Tips and Tricks