Cisco Webex app on Android 6.0.1 phone
Only one device fits the dimensions you've shared, and that's the Huawei GR5, which is a phablet with screen size of 5.5 inches, which doesn't fit any of the requirements. But even if it's not that specific model, it's not physically possible to have a bigger screen fit in those dimensions. So even if you're not talking about the Huawei GR5, your device still doesn't meet Cisco's requirements.