[ROM] for china mobile A4

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Hallo, is there any chance for me to find some ROM for my china mobile A4.
The basic ROM I have is critically slow.
Android would be best, but I will take even some windows.
Thx a lot

Btw:
Here is intel from factory mode:
BB Chip: NT6516
MS Board.: bird16_a10y
Modem Ver.: MAUI.10A.W10.48.MP.V5.F1, 20
11/01/27 16:48
UBoot Ver.: 2010.06
Kernel Ver.: 2.6.32.9 (wuyiping@ubuntu) (gcc version 4.4.0 (GCC) ) #1 Apr 11 2011
Android ver. 2.2.1
sw ver. 10YW1048MP