Not anymore. Sometimes in late December, ICQ users received following message: "We are discontinuing support of older ICQ versions and other unofficial clients

Not anymore. Sometimes in late December, ICQ users received following message: "We are discontinuing support of older ICQ versions and other unofficial clients. To continue chatting, you need: 1. Link a phone number to your account here https://icq.com/<redacted>/verifyphone?sc=<redacted> https://icq.com/<redacted>/verifyphone?sc=<redacted> 2. Log in using the official ICQ client which can be downloaded at https://icq.com" https://icq.com" I can still log in with an alternative client, see my contacts' status and receive text messages, but any message I send is either lost, or delayed by several days.