WhatsApp account connected to the services must be created at least 7 days before connecting, Telegram - at least 14 days. The account must be “warmed up” to avoid blocking by messengers.
If the number has been blocked, then after blocking you should wait at least 7 days (optimally 14 days) before connecting to services as well as WhatsApp WEB, while warming up your account according to the instructions below to avoid being blocked again.
Accounts warming up
For messengers, it matters:
From which account the mailing is made (how long registered, usual activity, etc.);
The text of the message to be sent (same text or variables are used);
Recipient of the message (cold, warm or hot base);
Reaction to messages (recipient complaints about spam, response to messages, reactions, etc.).
New accounts (registration in a messenger for up to 14 days) can be quickly blocked if they are used for bulk messaging (for messengers, sending more than 2 identical messages at once is considered as bulk messaging).
The more trust WhatsApp/Telegram has in an account, the more messages can be sent from it. Trust from WhatsApp/Telegram comes from a combination of normal actions and the age of the account:
Appearance online;
Conversations in conversations (preferably with contacts in your phone book);
Audio and video calls;
Joining and corresponding in groups/chats;
Making statuses (WhatsApp) or posting stories (Telegram Premium), etc.
When warming up an account right after registration, you should not do a lot of activity: correspond a lot, join a lot of groups/chats, make a lot of calls, etc.
It is also desirable to correspond from a new account not with a new account.
Approaches to account warming:
Correspondence of a fresh account with warmed accounts, 3-10 messages in a dialog every 3-8 hours;
Appear online for 1-3 minutes, both with messenger open on the device and minimized;
Open unread dialogs, make random clicks;
Join 1-3 groups/chats every 1-2 days, write messages there (you can just join);
Make 20-40 sec calls to contacts from the phone book 1-2 times a day;
Make it so that other people write to your accounts and reply to messages (autoresponder or manually).
It's best to start warming up by appearing online (1-3 days) for a couple minutes a day, then start corresponding with a long-established messenger account, making calls, etc.
What to do if WhatsApp is blocked
If the number has been blocked, you need to click on the Support button in the WhatsApp app in the pop-up window.
After 3 blockings in WhatsApp, the account may be blocked permanently.
As a rule, WhatsApp support responds quite quickly to requests and unblocking of the number takes place within 1 day.