Model No : ASUS_Z01RD ZB601KL
Issue started with latest firmware . I degraded to android P and is still same. I reinstalled and it is same.
Issue persist with SAFE MODE also.
Sim is perfectly working in other phone.
Exact Issue : Signal comes and goes. happenning every 5-7 seconds. meanwhile storage is getting full.
Also phone restarts automatically. Not sure if that happens before storage is completely full or starts before that also.
If i remove the SIM, phone works fine, except storage is getting full very slowly. In my test without SIM card, 1GB storage got full in 8 hours.
PS : All storage is getting full under "Other Apps"