Post micromax a52 root v4 rom

iam using micromax a52 stock v4 rom . when i try flash boot,img to root v4 rom by this method (Android Development and Hacking > Miscellaneous Android Development > Micromax A52 ROOTED!!!! ) then my phone is rooted but sim card is not detect.(but this method working for me rom v3). thats why i flash again stock rom v4 now phone is working perfect but i want root access so pls give me modified boot.img for stock rom v4