[Q] Benefits of changing carreir branded LG G2 to Sim Free firmware

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http://forum.xda-developers.com – there are some apps which i dont use in my LG G2 from Three Uk network. if i change firmware to UK open stock or Europe open stock, will my phone gain extra storage or will it perform better? i dont want to take the hassle of changing it just now due to time restrictions. once i am satisfied that the phone performs better without carrier bloatware then i will do it. (HowTos)