Yes. When employees must use their personal cell phones for work-related calls, Labor Code section 2802 requires the employer to reimburse them.   https://stormoenlaw.com/blog/2019/9/9/employers-must-reimburse-employees-for-work-related-cell-phone-use?fbclid=IwAR3OT5UZUjz9sUw6co5E3iXXHR94V--2m7ZkschfJ2REX9pV9UE6Au9ZCm8