Receiving messages - Not working

Hi

Am currently using iPhone 5 and Samsung Galaxy Note 2 alternately (for same mobile#). Workdays - iPhone 5 and weekends - Note 2

The issue am having is that once I switch the mobile# from iPhone to Samsung Note 2, i dont receive any messages sent from my friends iPhones. I have experience with couple of my friends who are using iPhones and am not able to receive their messages.

Is there any solution for the same.