Using personal cell phone with RingCentral App has a 3-4 second delay?

1. Account type (U.S.)
2. Related case number (N/A)
3. Detailed description of problem (See below)
4. Previous troubleshooting steps taken (reviewed network requirements and previous forums posts)
5. Software version (RC Phone Version 11.0.1.1.23, android, not sure about iOS)
6. Number of Users affected (Not sure, 50+?)

Small business of 50+ employees, we use our personal cell phones with the Ring Central app as our 'office phone'. Regardless of being on our local WiFi or using our individual mobile carriers, there is a 3-4 second delay between callers and users. Does something need to be configured on the app itself?

Kind regards