Ahhh yun pala, maraming salamat po sa explanation and educating me pocommon misconception ang pag gamit ng "ms", "MS" is the unit, more appropriate term diyan is latency, low latency better performance
and its doesnt have to do with apn because you will always be routed to the default access point. it all depends how strong the signal/reception, the phone and the how the carrier routes ports,packets