[gvd]

LTE will give you a datapoint roughly every 2 minutes. Accuracy will depend on the density of the LTE towers (150m - 2km). So besides Google, FB, etc. Telecom operators also play a role in this space. Remember that GPS might not always be turned on while your phone pinging cell phone towers happens all the time. With future 5G implementations this accuracy will be even further increased because the antenna range is short and the density will be much larger.