The "dual imei mtk write imei tool v11 full" you mentioned seems to refer to version 11 of the tool. Unfortunately, I couldn't find specific information on what's new in version 11 or its full features. Typically, new versions of such tools may include:
A dual IMEI MTK write IMEI tool is a software utility used to write or modify IMEI (International Mobile Equipment Identity) numbers on Android devices powered by MediaTek (MTK) chipsets. IMEI is a unique identifier assigned to each mobile device, and it's used by mobile network operators to identify and authenticate devices. dual imei mtk write imei tool v11 full
: The official MediaTek utility for writing serial numbers and IMEIs. The "dual imei mtk write imei tool v11