Frequently Asked Questions

399b FAQ — Frequently Asked Questions & Complete Answers

Find answers to all your questions about accounts, payments, bonuses, games, and security — all in one place.

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399b FAQ — Answers to All Your Questions

399b has quickly become one of Bangladesh's most popular online gaming platforms. Thousands of members enjoy slots, Sports Betting, bingo, and more every day. Whether you're new or a returning member, questions are bound to come up. This 399b FAQ page is here to give you clear, straightforward answers.

Here you'll find everything from how to open an account to payment methods, bonuses, game rules, and security — explained in plain, simple language that anyone can follow.

Browse the categories below to find answers to your questions. If you can't find what you're looking for, reach out to our support team.

Account Questions

Account

Opening a new account on 399b is quick and easy. On the registration page Enter your mobile number or email, full name, and password. Once your OTP is verified, your account will be activated. The entire process takes just 2–3 minutes.

No, only one account is allowed per person. If multiple accounts are detected under the same individual, all accounts may be suspended and any funds held may be forfeited.

After logging in, you can update your name, email, and mobile number from "Profile Settings". Identity verification may be required for changes to sensitive information. Contact the support team for assistance with important updates.

On the login page Go to the login page and click "Forgot Password?" Enter your registered mobile number or email. An OTP or reset link will be sent to you. Set your new password and log in.

The KYC process confirms your identity and protects against financial fraud. A copy of your national ID or passport must be submitted before making a withdrawal. This is an internationally recognized security standard.

Payments & Withdrawals

399b supports all major payment methods popular in Bangladesh, including:
  • BKash — Fastest and most popular
  • Nagad — Instant transactions
  • Rocket (DBBL) — Reliable mobile banking
  • Bank Transfer — for large amounts
  • Cryptocurrency — for selected members

The minimum deposit on 399b is just BDT 500. This amount has been set with everyday Bangladeshi players in mind, so you can enjoy gaming even on a modest budget.

Withdrawal requests are typically processed within 15 minutes to 24 hours. Transfers via bKash and Nagad usually arrive within 15–30 minutes. Bank transfers may take 1–3 business days. VIP members receive priority processing.

399b generally does not charge any fees on deposits. However, withdrawal transactions may be subject to fees imposed by the payment provider. Please refer to the terms on the payment page for details.

Common reasons for a rejected withdrawal include: incomplete KYC verification, unmet bonus wagering requirements, or incorrect payment details. You can view the reason from your account dashboard. Contact our support team for help resolving the issue.

Bonuses & Promotions

As a new member Registration Once you make your first deposit, the welcome bonus is automatically credited to your account. Visit the promotions page to see the bonus amount and terms.

To withdraw bonus funds, you must fulfill the applicable wagering requirements. Typically, you need to wager the bonus amount 5–20 times. Each bonus has its own terms — read them carefully before accepting an offer.

Free spin bonuses can be used on specific slots games. Winnings from each spin are added to your bonus balance. To withdraw from your bonus balance, you must meet the wagering requirements. Free spins have an expiry date — make sure to use them in time.

399b regularly offers reload bonuses, typically as weekly or monthly deposit bonuses. VIP members enjoy more frequent and higher-value reload bonuses. To see current offers, VIP Page View.

Games & Betting Questions

399b offers an extensive game library, including:
  • Slots — hundreds of classic and video slots
  • Sports Betting — cricket, football, tennis, and much more
  • Bet — live betting options
  • Bingo — fun bingo rooms
  • Live Casino — with real dealers
  • Table Games — Roulette, Blackjack, Poker

Yes, all games on 399b use internationally certified RNG (Random Number Generator) technology. Third-party auditors regularly verify the fairness of every game. RTP (Return to Player) information for each game is available on the game page.

Sports Betting The minimum bet in this category is just BDT 100. Maximum limits vary depending on the event and market. VIP members enjoy higher bet limits.

Live betting, or in-play betting, lets you place bets on matches that are already in progress. On the bet page Select a live event and place your bet based on real-time odds. Odds update as the match situation changes.

Security Questions

399b protects all data with 256-bit SSL encryption. Your personal information and financial transactions are fully encrypted. Enabling two-factor authentication (2FA) adds an extra layer of security to your account.

Change your password immediately and enable 2FA. Go to your account settings and log out of all active sessions. Then notify our support team — they will review your account and ensure additional protection is in place.

Never share your password or OTP with anyone. 399b staff will never ask for your password.

After logging in, go to your account settings and enable 2FA under the "Security" section. An OTP will be sent to your mobile number, and once verified, 2FA will be active. With 2FA enabled, an additional verification step will be required each time you log in.

399b never sells your personal information or shares it with third parties without your consent. Only the minimum data required for payment processing is sent to authorized payment gateways. For more details, see our Privacy Policy Read.

App & Device Questions

The 399b app is available directly from our Download Page Available from our official page for both Android and iOS. We strongly recommend downloading only from the official page — avoid any third-party sources.

To install an APK file on Android, you need to enable "Unknown Sources" or "Install Unknown Apps" in your phone settings. Go to Settings > Security > Unknown Sources and grant permission. You can turn it off again after installation.

There are a few simple fixes for this issue:
  • Close and restart the app
  • Check your internet connection
  • Clear the app cache
  • Update to the latest version
  • Restart your phone and try again
If you're experiencing issues, let our support team know.

Absolutely. The 399b website is fully mobile-friendly and can be accessed directly from any modern browser. However, App Enjoy faster loading, push notifications, and a better overall experience.

399b is committed to responsible gaming — it's meant to be enjoyed, not to become an addiction. For help setting limits and accessing support, visit our Responsible Gaming View page.

Why Choose 399b

Why Choose 399b

Thousands of Bangladeshi members choose 399b every day — and there's a good reason for that.

100% Secure Platform

With SSL encryption, 2FA protection, and regular security audits, 399b keeps your account and funds fully secure.

Fast Payment Processing

Withdrawals via bKash, Nagad, and Rocket processed in just 15–30 minutes. One of the fastest payment processing platforms in Bangladesh.

Massive Game Library

Hundreds of games including slots, Sports Betting, bingo, and Live Casino — with new games added every week.

Exciting Bonuses & Offers

Welcome bonuses, reload bonuses, free spins, and cashback offers are available on a regular basis. VIP members enjoy exclusive perks.

24/7 Bangla Support

Get help in Bangla any time, day or night. We respond quickly via live chat, email, and social media.

Smart Mobile App

Optimized app for both Android and iOS. Play from anywhere — with fast loading and automatic login.

Get Started Now

Have more questions? Join us now!

If you can't find your answer in the FAQ, contact our support team or open an account now and start playing.

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