I have a Z1 brazilian 6943 and my carrier is Claro. As you probably know 4G in Brazil is not great, even 3G is not 100% reliable so I have question that so far no one was able to respond to me.
When I leave the LTE(preference) WCDMA/GSM active under networks and I have 4G signal everything is ok, but the problem is that 99% of the time is not ok, there is no data available. So I expect the phone understand that LTE is not available and uses the 3G network but this doen not happen, I have zero data availability and I have to change from LTE (preference) WCDMA/GSM to WCDMA(preference)/GSM to have data...
Any one of you has the same situation? if so is there any way our phone understands that there is no 4G and uses 3G instead I have to do it manually?