A question about the Stone Gate of Destiny

At first, there was a two-step mobile phone in the oven, which was related to Okabe's mobile phone. Later, the assistant also joined in to complete the conversion, just to set the return time (the running time is obtained through the conversion) and then operate while sending the information, thus completing a message sent in the past. It doesn't matter whose mobile phone you use. Tong Sheng should use her mobile phone, because FB will only believe her number. For example, Liu Hua only needs to give the telephone number of Okabe's mother when canceling Dmail. The key is whether the content can influence people's decision-making in the past. You may have overlooked the fact that the oven has been modified. You will find that Okabe ran back to use the computer with headphones in the subsequent operation, right? It was different from the beginning, wasn't it? It was modified by the assistant, because during the test, it was found that the size of the content that can be input in the oven is limited (the short message is divided into three, right). The result of the modification is to extract the memory of this world line and send it to another world line to cover it, thus completing the memory inheritance. When you finally canceled Dmail, you must have watched it for a short time, so there was no such setting, because before the transformation, TV was ignored in narrative time, which is clearly explained in the game here.