Why buy a smartphone with a good connectivity?
When we speak of 2G, 3G, 4G / LTE that supports our phone we are differentiating between voice transmission networks (calls) or data networks, which are differentiated by download speed or navigation.
DATA AND HIGH SPEED
A user should look for the type of network that supports a smartphone because it depends of how you enjoy the best connection for browsing the Internet, download content, etc., and these tasks are frustrating if you do not have a good 3G or 4G / LTE connection. Most mobile devices support 4G / LTE and that means high speed data connection. However, if you are thinking of buying a phone and do not see if it supports 4G / LTE, as a rule it means that it uses 2G and 3G networks to slower data connections than 4G, when the most recommendable in 2016 it was as a minimum provide support for 4G.
There is a big difference in speed between the 3G and 4G / LTE is a very little price difference between devices that support 3G and 4G. Therefore, we should always choose to buy a device that supports 4G / LTE against 3G.
It seems that the technology market is already beginning to move for 5G networks and any user should have to this day a smartphone that supports a minimum of 4G / LTE to avoid having an obsolete device.
FREQUENCY BANDS OF OPERATORS
The mobile operators use different frequency bands to serve their customers. In all countries of the world there is an agreement between the available frequencies of operators and we as users need when buying a smartphone, to check the one supporting the frequency bands of our usual mobile operator or what phone is compatible with some of the bands of the geographical area or compatible where you will travel in the future. If you do not look at this when buying a smartphone that has very good technical specifications, but cant be used where you live, where you travel or with your operator, it is useless. Keep in mind that if a mobile device does not support the frequency bands of your current mobile operator or supports only some of them can lose good coverage on more than one occasion.