XHIU-FM 105.7/XEIU-AM 990 is a combo radio station in Oaxaca, Oaxaca, Mexico, known as Oreja FM with a Spanish adult hits format.
It broadcast on 1160 kHz as a daytimer, moving to 990 sometime in the 1980s or 1990s and then adding an FM station in 1994.
The combo station was then relaunched as Stereo Cristal.
On May 1, 2019, Grupo Radiorama ASG took control of XEIU/XHIU, bringing it under common operation with XHEOA-FM, XHOQ-FM and XHYN-FM.
Within weeks, the station rebranded as "Oreja Cristal".