How to obtain the real deviceId

How do I get the real device ID through the deviceId stored in mongodb, for example, the deviceId ‘tcdevee.ictr.com.cn:neglaACZJrpeToXZ’ stored in mongodb, the real device ID ‘399514213d2c3df’, how do I get ‘399514213d2c3df’?

Thanks

@DannaShen, the deviceid metadata would work more effectively if you use the Collect Android App instead of using Enketo.