It takes a lot to interfere with a cell phone transmission. As such, transmitting votes from a polling place to a central tabulation center is a secure process with encrypted files and speedy Internet times. There is almost no excuse for faulty voting practices in developed nations with modern technology in place today.
Transmitting votes from individual polling stations to the central tabulations center is not a secure process. Many experts have expressed concerns about this process and stated that the system poses risks. Additionally, unless very carefully monitored, it would be easy for someone to switch information before transmitting it to the central tabulation center.