Can the hardware parts of a phone be upgraded?

Dr.Sunil Vaswani March 26, 2012
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Is it possible to upgrade hardware parts – processor and random access memory even if the manufacturer disagree to do it on it’s own?

My phone runs slow though it’s features are very advanced ( OS , camera , flash , 3G , gps , wifi , tethering , dual sim )

Who, other than the manufacturer can be approached?

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