No. Ready is designed to be used on a single device at a time.
Although you can recover your wallet onto a second device, this is intended for replacing or restoring access to your wallet, not for using the same account on multiple devices simultaneously.
Recovering your wallet on a new device will disable certain features on the original device. For this reason, using the same Ready account across multiple devices is not supported.
This behavior is an important security feature. For example, if your phone is lost or stolen, recovering your wallet on a new device helps prevent the old device from continuing to access your wallet.