Xperia z3 network problem - Xperia Z3 Q&A, Help & Troubleshooting

My xperia z3 network mode only works for 3g or 4g, only 2g when selected, can't connect to network. i have lost nano sim tray, just inserted the sim carefully. if this is a problem? can't connect to 2g, but connecting to 3g mode. any solution? tia

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Switch to 2G when connected to Wifi

hi,
is there a way that my phone automatically switches from 3G to 2G, when connected to a Wifi network?
I figured, the only reason why I need 3G, is because of the fast mobile internet connection......which I wont be using anyway, while I'm connected to a Wifi-Network
so it would make alot of sense to switch the cellular network from 3G to 2G, to save battery....
is there an app for that?
okay, well...tasker can easily do that
I think I got my solution

VPN ports blocked

Hi, I have been using VPN over a 3G, on my Sony Xperia Arc. Everything was fine until yesterday, when I noticed that I cannot connect to the VPN over a 3G. Although, the VPN works when connecting over a 3G wireless connection, but it doesn't not connect when using 3G on phone (using only sim-card in phone to get 3G connection, no router)
The VPN provider said that it's likely my telecom has blocked VPN ports on phone and it's different when connecting over a 3G wireless and 3G.
Is there any other way I can possibly connect VPN over a 3G???? I'm not planning to root my phone though.

[Q] can an exterrnal dongle connect to xperia P

Hi, I have a 3G internet connection sim/data sim which can be used only for using internet, no calls in normal size(normal sim card size). I need that sim to connect Internet through xperia p phone so that I can use internet through my phone. I m to connect that sim through another device...Is there a way to connect a separate dongle to the phone or use it ? any other device ? The phone has its sim which I can get calls. My android ICS 4.0.4.

[Q] Can't connect to EDGE

I have 2 htc tytn phones running Windows Mobile. In one phone that i was using before the connectivity was EDGE, which was indicated by the E symbol. Now i have started using the other phone (same SIM card), but the symbol shown in this phone is G, which stands for Gprs, i guess. My operator supports EDGE, so why this other phone can't connect to it? Although internet works fine, but when the data connection is active a small G appears, instead of a small E, which used to appear on the other phone.
Is there anyway to fix it?

Question regarding WiFi and Cellular connection.

When my mobile phone is connected to WiFi is it still accessing 4G, 3G or 2G?
I'm asking as ive been having an issue where my phone signal is really bad when I'm connected to Wifi at home or work and my network (Vodafone) has advised me to switch to 2G when this happens. But if I'm connected to WiFi will this have any bearing? As from my understanding the phone is actually downloading data from the WiFi not a cellular network?
Thanks.

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