Given the question: Given the following passage  "China Mobile had more than 2,300 base stations suspended due to power disruption or severe telecommunication traffic congestion. Half of the wireless communications were lost in the Sichuan province. China Unicom's service in Wenchuan and four nearby counties was cut off, with more than 700 towers suspended.",  answer the following question. Note that the answer is present within the text.  Question: What happens when there are too many people using their cell phones?
The answer is:
base stations suspended