"So, did you find anything from the number that sent the text?"
Gu Xu asked anxiously.
Yu Fei shook his head, "This phone number isn't registered under any real name. Such numbers are widely available for sale, not processed at official outlets but bought from kiosks or train and bus stations as temporary SIM cards, so there's virtually nothing we can trace."
"Can you track the location through the SIM card chip?" Gu Xu asked again.
"The person was very cautious. After sending the text, they quickly turned off the phone, so there's no way to locate or track it." Yu Fei once again rejected Gu Xu's idea of using satellite GPS tracking.
"Try to trace the number sequence. Generally, these unregistered numbers are sequential, and a batch of numbers would be in one person's hands. Check who sold the card and see if you can get any valuable information from that person's mouth!"
