LG E739 - Manual (Page 116)

116 LG-E739 | User Guide
Caution
Use only the supplied antenna. Use of unauthorized
antennas (or modifications to the antenna) could
impair call quality, damage the phone, void your
warranty and/or violate FCC regulations.
Don’t use the phone with a damaged antenna. A
damaged antenna could cause a minor skin burn.
Contact your local dealer for a replacement antenna.