Samsung SPH-M300ISASPR - Manual (Page 57)

Section 2A: Your Phone: The Basics 33
Phone Basics
Making and Answering Calls
Holding Your Phone
Since the antenna has been integrated into the design of the
phone, it is important not to block the reception path
accidentally to ensure the strongest signal possible is
achieved. The orbital internal antenna is located near the
base of your phone next to the microphone.