Problems of network

[Deep1990]

My xperia z phone network has not work properly in out of city. So plz tell me whats reasion.

[Qatrium]

- Make sure you have network coverage out of city.

- Make sure that your operator allows roaming on your line.

[jonchill]

This is happening because there is very low network out of the city and mistly because there are no networks towers in those areas

[Lord_viridis]

Agree with the above, rural coverage varies by network and seldom ever sees the same levels of coverage as a city would.
If possible, test coverage by getting a range of pre pay some and see which network gives you the best coverage.