> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://faq.mtxc.eu/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# 我的账户余额保持多久有效？

您的MTX Connect SIM卡账户余额在您最后一次充值日或者最后一次激活任何一个服务当日（两者中取最近发生日期）后18个月有效。