Tried to call my #Phrat Brother, but there was no #cellcoverage. Blocking occurs when many cell phones attempt to access the same #cellsites unexpectedly. Unlike #POTS connections where there wires that connect each #telephone to the #switch in the #centraloffice, hundreds of #cellphones can just appear "suddenly" at a location--like #howarduniversity. So the network has to block access to prevent overloading. You can well imagine that blocking could be a problem during an #emergency 2/