This device complies with part 15 of fcc rules, This device must accept any interference received – Samsung SGH-X427 User Manual
Page 143
 
Health and Safety Information
138
Acknowledging Special Precautions and
the FCC and Industry Canada Notice
Cautions
Modifications not expressly approved by the party 
responsible for compliance could void the user's authority 
to operate the equipment. 
FCC Compliance Information
This device complies with Part 15 of FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received.
Including interference that may cause undesired operation.
Information to User
This equipment has been tested and found to comply with 
the limits for a Class B digital device, pursuant to part 15 of 
the FCC Rules. These limits are designed to provide 
reasonable protection against harmful interference in a 
residential installation.