SHEIN does not offer a dedicated 24-hour customer service telephone number for all regions. For example, in the United States, SHEIN states that a US call center is not yet available and directs customers to use their 24/7 online customer care chat service instead of providing a phone number[2]. Similarly, for the UK, the official contact page lists a live chat available from 9:00 to 22:00 daily, not 24 hours, and does not provide a direct customer service telephone number[4].

However, there is a phone number listed specifically for Shein Singapore: **(844) 802-2500**[1]. It is unclear if this number is staffed 24/7; the source only mentions that 24% of customers managed to speak with a real person, but does not specify the hours of operation[1].

**Summary Table**

| Region | 24-Hour Phone Support | Notes |
|——————-|———————-|————————————————————|
| United States | No | Only 24/7 online chat[2]. No call center number provided. |
| United Kingdom | No | Live chat 9:00–22:00; no direct phone number listed[4]. |
| Singapore | Unknown | Phone number available: (844) 802-2500; hours not stated[1].|

For most users outside Singapore, the primary way to reach SHEIN customer service is through their 24/7 live chat on the website or app[2]. For Singapore, you can try calling the listed number, but it is not confirmed to be available 24 hours[1].