How convert Motorola V8 512Mb to V8 2Gb
 

Hallo! Can you help me?
I have one working motorola V8 512Mb. And another one Motorola V8 2Gb Luxury, which have some problem with network, and as i understand problem maybe in processor.
Anywhere, i am decided, to convert my V8 512Mb to V8 2Gb.
When, i'am disassembly both of them, and try to search difference between this two mainboard, i've see that the difference, only in memory chip to 2Gb.
So, i'am, remove this chip from V8 2Gb and put it at the V8 512Mb.
After this both of them is still powering on, and even more, the program recognize V8 2Gb Luxury like V8 2Gb Luxury, and V8 512Mb like V8 512Mb.
So, looks like nothing chanched after i'am remove this chip from one phone, and put to another one.
So, i'am try to change firmawe. The V8 2Gb Luxury, i can not flash firmware from V8 512Mb, allways got error.
But the phone V8 512Mb, without problem flashing with flashfile from V8 2Gb Luxury, but after this phone hang on Moto Logo. And when i'am flashing again with own files V8 512Mb, phones powering on and works perfect like before.
Look's like that the phone is not recognize, that i'am put to mainboard memory chip.
So, the quastion is, what else i have to do, to make this conversation?
How, to make for phone understanding that he is become from V8 512Mb is V8 2Gb? :)