Is it illegal for the front desk not to answer the phone after staying in the hotel?

Whether it is illegal for the front desk not to answer the phone after staying in the hotel depends on the specific situation. The front desk of the hotel can't answer the phone immediately for various reasons, such as being busy, understaffed, technical failure, etc. This is not illegal. However, the front desk of the hotel deliberately refused to answer the phone or provide services, which violated the Consumer Protection Law of People's Republic of China (PRC) and other relevant laws and regulations on consumer protection.