[2] It serves the Victor Valley area and eastward into the High Desert along I-15 from the Cajon Pass to Baker and I-40 to Essex.
It was announced in Living Proof's quarterly newsletter that KWTH would be changing hands in late October or early November and that Living Proof would truly miss being able to serve the Barstow and Victor Valley communities, and encouraged people to listen on KWTD 91.9 FM as they traveled across to the western portion of the High Desert.
Later, KRTM also began simulcasting on KKRS in Davenport, Washington, KTWD in Wallace, Idaho, and WKJA in Brunswick, Ohio as well as several translators.
On August 11, 2011, KWTH changed ownership to Calvary Chapel Costa Mesa, and continued to simulcast the feed of the KRTM Radio Network until August 16, 2011, when it began simulcasting the HD2 channel of K-Wave 107.9 in San Clemente, California, which airs a commercial-free and jockless parallel of all exactly the same programs as the analog signal.
Effective June 18, 2021, Calvary Chapel of Costa Mesa sold KWTH to New Life Christian School's Advance Ministries, Inc. for $30,000.