Original sentence: However, the use of mobile phones on aircraft is forbidden across the board by most aviation regulators, and the design specifications of individual aircraft are not taken into account.The most well-known reason for this banning is that the mobile phone could interfere with the sensitive equipment on the aircraft.This basis can be seen in plans to improve certification.This policy is often based around the fact that during development, many aircraft were not designed to accept signals from mobile phones and there has not been sufficient testing to be sure that they could
Edited sentence: However, many aircrafts developed after the invention of mobile phone generally also forbid the use of cell phones in flight as a precaution.The most common reason given for this is that the mobile phone could interfere with the sensitive equipment on the aircraft.This could be restated as "during development these aircraft were not designed to accept signals from mobile phones and there has not been sufficient testing to be sure that they could" as can be seen from plans to improve certification