@darvinoswrote:
Although I know that at some point there is a strong mobile phone signal, suddenly can not make a call or someone call me.
I have to restart the device and immediately afterwards everything is working normally again.
Since November I bought my device has happened more than 10 times.
I'm losing business calls when I have not figured it out.
Screen displays are normal. It looks like I have a connection.
Try the same SIM with other phones if the problem persists, then try asking your Telco for a new SIM.
If it is just the XZ1, try doing a Software Repair using Xperia Companion (WARNING: This will wipe your phone unless you know... backup)
