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Hello
I bought last week two new UMI Z smartphones.
From the begining I have problem with the Cellular data on 3G and 4G.
The signal is good but there is no connection.
I tried to upgrade to 7.1.1 but the problem is still there.
Our cellular network works on:
3G - 900/2100
4G - 1800/2600
I need a solution!!!
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