Dual SIM Samsung Galaxy S4

Samsung China has already made official the dual-SIM variant of the Samsung Galaxy S4, carrying the model number GT-I9502.
The dual-SIM version of the Galaxy S4 will have specs similar to the I9500 model meaning it will sport an Exynos 5 Octa chipset. The Samsung I9502 Galaxy S4 is only available for the Chinese market as of the moment.[source]