According to your description, this is impossible. Generally, the Lexiang 189 package of telecom has a two-year or three-year contract. Your 240-month and 20-year contract period is not allowed. If in doubt, please contact customer service. Anhui Telecom will serve you wholeheartedly, and I hope my answer can be adopted by you.
Telecom has reduced its price, and the mobile phone bill is only 30% off! 49 yuan charges 129 yuan, including 330 minutes of voice and 600M traffic, which can double the traffic 1 yuan! 69 Yuan Bao 189 yuan; 89 yuan package 289 yuan; 99 yuan bag is 329 yuan. Please visit Anhui Telecom's online business hall for details.