I have been making the use of the phone of the Sony Ericson K750i and also I have a phone of the new edition of the Sony Xperia X8. I have been planning to upgrade the phone that I am just making use of and also it is in the case of the many of the device of the phones that I have just started to make use of. And also the fact is that the working of the phone of the Sony Xperia is the best but still I am just planning to upgrade the software that is being used by me in the phone. I have done a lot of the up-gradation for the phones to the phone of the Sony Ericson K750i, but still it is working out well and the new buy of the phone of the Xperia X8 is just having the software of the Android 1.6. Please tell me the solution through which I can just do the up-gradation of the phone of the Xperia that is being used by me.