:laugh:,have you installed rros 5.8.5-20171120,I notice that your p9 model is DL00,if you installed but sim card can't work,you could flash the file SIM2-DL00.zip,I guess your sim card can be recognized.But in china,cmcc can't be used because surda is Germany,he doesn't make a adaptation which is suitable for chinese cmcc network so that cmcc can't use VoLTE.For me, my device is TL00,I flash SIM2-L19-L29.zip and my simcard can work,but it doesn't support VoLTE,calling somebody will show call ended,so I must chage the apn from cmnet to ims,expecting surda can adapt VoLTE.thx!