AT&T Mexico Cell Service.... Muy Bueno o Muy Mal? Experience por favor!

With any mobile phone network, signal comes from the frequencies used. In general, low frequencies are most reliable and capable of penetrating obstructions like buildings, which is why 3G will often work in more places than 4G. Higher frequencies are more direct but are also more easily scattered by objects. Mobile carriers that want to provide the more reliable services will aim to use lower frequencies, however those that want their customers to have access to faster download speeds will also aim to offer higher frequencies. As 5G will use higher frequencies, which have a more limited range, more 5G towers will need to be installed to support the reliability of the network. However, as these are smaller and don’t require a tower they can be placed on buildings and lampposts, for example.