Problems with the data connection

Hello
I bought a Z3 Compact Xperia on December 10, 2014. I live in Italy and I use Vodafone as my everyday.
I got a SIM card replacement nano with LtE capabilities just to get the phone in the new fast network. The problem I encounter is that, since on January 13, 2015, I had some problems with the data in mode 3 G connection.
So far, I used my phone normally, then I tried to send a text message with WhatsApp and phone stuck with the clock icon in the lower corner of the bubble of the message. I thought it was a temporary network problem but I'm not sure about this.
I live in a small town where the coverage is really good, either in 3G and LTE. I tend to use the 3G because it uses less battery and it does not affect my 4G data plan.
Th issue, it's that if I do a speedtest when I feel that network glitch I have a ping, but with very good download speeds up to 2000ms.
The problem is that I believe that this is not a network problem because my mother has a phone HtC One S and runs vodafone without problem even when I'm having the glitch.
I tried to reset the phone to factory settings, but it did not help.
In LTE / 4G I do not experience this issue. In fact, I think if there is problem need a phone related software because the antenna works very well.
If it doesn't I'll try to contact ad Vodsfone then I'll send my phone for the helpdesk if Vodafone tell me that the question is not on their network.

Thanks in advance for your help.
Simone

It's pretty strange, double check the APN settings and contact EE in this regard.

Tags: Sony Phones

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