What you need
- Your phone with WhatsApp installed
- For an appeal: the official app, not a modified one
Two completely different problems get searched with the same words. One is that you blocked a contact and want to undo it — that takes about ten seconds. The other is that WhatsApp has banned your number and you cannot use the app at all — that takes an appeal, and whether it works depends entirely on why it happened. This guide covers both, starting with which one you actually have.


Either a contact unblocked in seconds, or an appeal submitted properly with a realistic view of whether it will succeed — and, for a business, a route that stops it happening again.
Settings, then Privacy, then Blocked contacts — tap the person and choose Unblock. You can also open the chat and tap Unblock at the bottom. Messages they sent while blocked are not delivered afterwards; they were discarded rather than held.
Uninstall any modified WhatsApp such as GB WhatsApp first and install the official app, because appeals from modified clients are refused. Then use the Support or Request a review button on the banned screen and write a short, specific appeal in your own words. Temporary bans often lift within hours; permanent ones depend entirely on the reason.
A temporary ban usually clears within a few hours to a day, and the timer can restart if you keep trying to sign in — so waiting is genuinely faster than retrying. A permanent ban does not expire; it is lifted only if a review overturns it, which is why the appeal matters more than the waiting.
Your own words, kept short: who you are, what the number is used for, that you are on the official app, and what you have changed. Avoid the copy-and-paste appeal templates circulating online — thousands of identical submissions are exactly what a review process learns to discount.
Usually a modified client such as GB WhatsApp or WhatsApp Plus, or behaviour that looks automated or unwanted: messaging many people who never contacted you, adding strangers to groups, rapid identical sends from a new number, or accumulating blocks and reports. For businesses it is nearly always bulk messaging without consent.
You cannot know for certain, and that is deliberate. Their last seen and profile photo disappearing, messages stopping at one tick, and calls not connecting are all consistent with being blocked — and equally consistent with them changing privacy settings or having no signal. No app or website can tell you, and the ones claiming to are after your account.
Written by Riya · Reputoo. Riya writes Reputoo’s guides on WhatsApp and the WhatsApp Business API. Updated September 2026.
1,000+ businesses onboarded · Member of NVIDIA Inception · Official WhatsApp Business API, no per-message markup.