Hello Sai,

As per your Query these are the best Mobile processor Manufacturers in the worls,

1.Apple Bionic SoC.

2.Qualcomm Snapdragon SoCs.

3.MediaTek Helio SoCs.

4.HiSilicon Kirin SoCs.

5.Samsung Exynos SoCs.

These are the best mobile processor manufacturers in the world.

The SOC is a Processor  and it is the heart of the mobile phone,It is an Integrated circuit with all parts of a mobile on one single chip.It can defines mobile device and contains within the processor cores,graphics chips,the antennas,ram and image processors.

Hope You Understand...............................

Best Wishes For Your Career..................

STAY SAFE........................!