Big Mumbai Register Problems: OTP, Number and Link Errors

What Big Mumbai registration needs

Most failed sign-ups come from a small mismatch between what was typed and what the form expects. Registration here is kept light on purpose, and it asks for very little:

• A 10-digit Indian mobile number, with the country code set to +91 and no zero in front. This number becomes your account name and your only recovery route.
• A password you choose, ideally long and used nowhere else.
• An OTP sent by SMS to that same number, which proves the phone is yours.
• An invite code, only if you have one. It is optional, and it can normally only be entered during sign-up, never added afterwards.

Identity documents are not part of sign-up; they come later, when you make your first withdrawal. So if a page asks for Aadhaar, PAN or a selfie before you have even created an account, or asks you to pay anything to “activate” registration, you are not on the real form. Start from the Register button at the top of this site, or from the address bigmumbai.uk typed by you, rather than from a link someone sent. The complete field-by-field walkthrough, including which phone number is worth tying the account to, is in our step-by-step sign-up guide.

OTP not arriving during sign-up

This is the most common complaint by a wide margin, and it is rarely a fault with the account. The message is usually sitting somewhere on the phone side. Before you tap resend, check these in order:

1. The number you typed. Read it back digit by digit. A single swapped digit sends the code to a stranger, and an extra leading zero or a doubled +91 makes the number invalid.
2. Signal and SIM. SMS needs mobile network coverage, not just Wi-Fi. On a dual-SIM phone, make sure the number you registered is in an active slot.
3. DND and spam filters. Do Not Disturb settings and the spam or promotions folder in your messaging app can catch automated codes. Look there before anywhere else.
4. A full inbox. Older phones can quietly reject new texts when message storage is full. Delete a few old threads and try again.
5. Patience with resend. Wait a full 60 seconds before asking for another code. Requesting several in quick succession can trigger a temporary block, which then looks exactly like a code that never comes.

If you did trigger a block, step away for a while rather than retrying every minute; the wait resets more quickly when you stop requesting. And keep one rule absolute: an OTP is for you to type into the form yourself. Nobody from this site will call or message to ask for it, and anyone who does is trying to take over the account you are creating.

“Number already registered”

This message means exactly what it says: an account already exists on that mobile number. It is more common than people expect, and there are three usual explanations.

• You signed up before and forgot. Many players open an account, try it once and return months later. The answer is the forgot-password option on the sign-in screen, which sends an OTP to the same number so you can set a new password.
• Your first attempt actually worked. If the form timed out or the page froze after you entered the OTP, the account may have been created anyway. Try signing in before anything else.
• Someone else used the number. A family member may have registered with it, or the number may have belonged to another person before your operator issued it to you. In that case, reach support through the help options on the official site, with whatever you can show about the number, rather than trying to work around it.

What you should not do is register again on a second number to get around the message. One account per person is the rule, duplicates tend to be noticed when money is withdrawn, and the usual result is that both accounts are frozen while the matter is reviewed. Recovering the account you already have is slower in the moment and far quicker overall.

Registration links that do not open

A link that loads a blank screen, an error page or a page that never finishes is usually down to where the link came from, or to the app you opened it in.

Shared and old links. Registration links travel through chat groups, video descriptions and screenshots, and many of them are months old. Some simply stopped working. Others now point to an address someone else has taken over, so a page that does open from an old link deserves suspicion too. Check that the address reads exactly bigmumbai.uk before you type a number or password.

In-app browsers. Tapping a link inside a chat or social app often opens it in that app’s own built-in viewer, which can block new tabs and pop-ups or keep stale data. Use the menu to open the page in Chrome or your usual browser, then start registration again.

Cache, data saver and blockers. An outdated browser, an aggressive data-saver mode, a VPN or an ad blocker can stop the form from loading properly. Clear the site data, turn those off for a moment and reload. If the screen opens but stays frozen part-way, a slow connection is the likeliest cause; move to better signal and start over rather than refreshing in the middle of the OTP step.

Invite links. A referral link carries its code with it. If that code has expired, the form may reject it or refuse to continue. Register without the code instead of waiting for a new link; the account matters more than the referral.

After sign-up: first login

Once the form is accepted, the first sign-in should be routine, but a few small habits prevent the errors that newly created accounts tend to hit:

1. Sign in with the same number, in the same format. +91 selected, 10 digits, no zero in front. Most “user not found” errors right after registering come down to the country code.
2. Type the password exactly. Phone keyboards like to capitalise the first letter on their own. Use the show-password icon to check before you submit.
3. Clear leftover session data if it will not log in. If registration finished but the sign-in screen keeps rejecting you, clear the site data or restart the app before you assume anything is wrong with the account.
4. Bookmark the real address. The page you have just registered on is the one to save. Coming back through the bookmark every time is the simplest protection against lookalike login pages.
5. Look before you deposit. Check that the account and balance look right, read the withdrawal terms, and only then decide whether to add money at all.

If sign-in errors continue after all of that, the full list of causes, from locked accounts to sessions that keep ending, is covered in our guide to fixing sign-in errors, along with password recovery when you can no longer remember what you set.