HTC EVO manual: http://support.sprint.com/global/pdf/user_guides/htc/evo/htc_evo_ug.pdf http://support.sprint.com/global/pdf/user_guides/htc/evo/htc... Page 16

HTC EVO manual: http://support.sprint.com/global/pdf/user_guides/htc/evo/htc_evo_ug.pdf http://support.sprint.com/global/pdf/user_guides/htc/evo/htc... Page 169: "To assure optimal phone performance and ensure human exposure to RF energy is within the guidelines set forth in the relevant standards, always use your device only in its normal-use position. Contact with the antenna area may impair call quality and cause your device to operate at a higher power level than needed. Avoiding contact with the antenna area when the phone is IN USE optimizes the antenna performance and the battery life. "