How to set the date and time of telecom customized mobile phone

(single mode refers to a cell phone with only one card slot, and only the use of telecommunications cards.) Dual-mode refers to the mobile phone has two card slots, you can use a telecom card and a mobile or Unicom 2G card, telecom card as the main card, as long as the use of the telecommunications card, date and time are automatically adjusted, without manual adjustment. This is a customized dual-mode mobile phone a765e as an example to illustrate:


However, if the dual-mode mobile phone only use mobile or Unicom 2G card, then the dual-mode phone except a600e can be "automatically determine the date and time" option after the check out, and then manually in the "Set Date" and "Set time" two options respectively.