Sir,
Please give us your source of information. Have not heard or read about this anywhere.
The only condition which is required in import is that every mobile should have a unique IMEI number.
Today most mobile Brands including Nokia have their mobiles manufactured in China due to low cost there. Most of the Tata Indicom and Reliance CDMA phones are sourced from Chinese OEM inluding Huwaei. Brands like Fly, Bleu, Spice, Onida exclusively source their handets from chinese oem.
Regards,
Devesh