The LC-60LE857 supports an 802.11a WiFi standard which is newer than most televisions of a comparable age and spec to it. Most similar spec TVs that were launched around the same time as it support an 802.11n WiFi standard. This Sharp television also support an 802.11b and 802.11g WiFi standard.
An 802.11a WiFi standard is in fact the worst supported WiFi standard across all large TVs that are a comparable age to the LC-60LE857.
Across comparable types of TV the best supported WiFi standard is 802.11n.