Open the finished APK
In Downloads, tap the wintk file that finished completely. If Android shows two similar names, pick the one that matches the size you just downloaded (about 36.1 MB).
Download Center · Android · Bangladesh
How to Download & Install wintk APK in Bangladesh (v3.9.9)
This page walks through downloading and installing the wintk APK on Android in Bangladesh — current build 3.9.9, about 36.1 MB. Use Wi-Fi or mobile data, allow unknown sources when Android asks, then open the app.
wintk
Updated 8 October 2026 · technical note by Arif Chowdhury · Sylhet
- 01Prepare
- 02Download APK
- 03Install
- 04Open the app
Prepare before you download wintk
A short ready-check so the 36.1 MB APK finishes cleanly on Bangladesh networks.
- Confirm your phone runs Android 6.0 or higher — older systems may refuse the install.
- Prefer home Wi-Fi. On Grameenphone or Robi 4G, avoid the busiest evening window if downloads keep restarting.
- Free about 80 MB storage: room for the 36.1 MB file plus temporary install space.
- Pause other large downloads so Chrome or Samsung Internet can finish the APK without stalling.
- Stay on this channel or the Official page — skip look-alike domains from ads or Messenger.
About the wintk APK download for Bangladesh
This Download Center is for users who already know they want the APK and need clear install steps. The active release is version 3.9.9. The main package is about 36.1 MB; a lighter ARM build around 23.9 MB helps when mobile data is tight. The previous release v3.9.8 stays listed so you can tell when you are updating.
Tap Download APK wintk on this page to start the file. You do not need to pay bKash, Nagad, or Rocket only to “unlock” a download that is already listed here for free. If a site demands payment before the APK starts, leave it and come back to this channel.
Product background (what the app is, who it suits) lives on the App page. This page stays focused on prepare → download → install → open. After the app launches, use Login when you need an account — not before the APK is installed.
If the transfer drops on 4G in Dhaka, Chattogram, or Sylhet, delete the incomplete file in Downloads and try again on Wi-Fi or a quieter data window. A full file that matches 3.9.9 is safer than installing a truncated download.
Package ready · v3.9.9 · 36.1 MB
Start download nowAfter the wintk download finishes
Confirm the file before you tap Install.
- Open your Downloads folder (or the notification) and find the finished wintk APK — not a .crdownload or partial file.
- Check that the build matches 3.9.9 and the size is close to 36.1 MB (or ~23.9 MB for the ARM package).
- Keep enough free storage for the installer after the download.
- When Android asks, allow install from Chrome, Samsung Internet, or Files for this install only.
- If a security app blocks sideloading, pause it briefly, finish install, then turn protection back on.
- Do not open random APKs from WhatsApp or Telegram with the same icon — stick to the file you just downloaded here.
When you should re-download wintk
Situations where a fresh 3.9.9 package fixes more than retrying Install.
- The download stopped halfway on mobile data — delete the incomplete file and start again.
- Install says App not installed or the package appears corrupt.
- You are updating from an older build (for example v3.9.8) and the update path fails — uninstall the broken copy, then install a clean 3.9.9 APK.
- You cleared storage and removed the APK before install finished.
- You accidentally opened a different file from chat history instead of this channel’s download.
How to install wintk on Android in Bangladesh
Four steps from the finished APK to the first open — the path most phones follow.
Allow install from unknown sources
Android may ask to allow your browser or Files to install unknown apps. Turn it on for this install. You can turn the permission off again after wintk is on the phone.
Confirm version, then Install
On the install screen, confirm you are installing 3.9.9. Tap Install and wait — do not switch away mid-process on low-storage phones.
Open wintk
When install completes, open wintk from the home screen or the success prompt. Use Login only if you need an account next.
Detailed install notes for common phones
Extra detail for Chrome / Samsung Internet prompts and mistakes that waste a download.
Pick the file from this channel
Open only the APK you downloaded from this Download Center or the linked button on the Official page. Chat attachments with a similar icon are a common source of failed or unsafe installs in Bangladesh groups.
Unknown sources — on for install, then off
On Android 8 and newer, permission is usually per-app (browser or Files), not a single global switch. Allow it, finish wintk, then disable that permission again so other random APKs cannot install quietly.
Network during download vs during install
You need a stable connection mainly for the download. Install itself runs from the local file; if install fails after a full download, the problem is usually storage, permission, or a corrupt file — not a brief data blip.
If Install fails, re-download before looping
“App not installed” after several tries usually means a bad or partial APK. Delete it, free storage, download 3.9.9 again, then install once. The Guide covers more error cases.
After wintk is installed on your phone
Open the app once to confirm the install worked. If Android shows a notification permission prompt on first launch (common on Android 12–14), choose what you need — you can change it later in system settings.
Account access comes after install. When you are ready, follow the Login page. Do not share OTP SMS codes with anyone claiming to be support on WhatsApp or Facebook Messenger.
Want a fuller product overview (features and specs) without the install checklist? See the App page. For download or open errors that keep returning, use the Guide before trying random “fix APK” blogs.
Safer wintk download habits in Bangladesh
Simple practices that keep the 3.9.9 APK coming from the intended source.
Stay on the official listing
Download from this page or paths linked from the Official channel. Avoid mirrored “VIP” pages that ask for bKash or Nagad before the file starts.
Match version and size
Before Install, confirm 3.9.9 and a size near 36.1 MB (or the ARM size if you chose that package). Mismatched files are a red flag.
Be careful on public Wi-Fi
Cafe or shared Wi-Fi is fine for many users, but if the network feels unreliable, finish the download on home Wi-Fi or your own mobile data instead of repeating half transfers.
wintk download FAQ for Bangladesh
Still stuck? Visit the Guide or check the official channel.
What is the wintk APK file size in Bangladesh?
The main wintk APK is about 36.1 MB. An ARM package around 23.9 MB is also listed when you want a lighter file on mobile data. Keep about 80 MB free for install temporary files.
How do I download the wintk APK?
Tap Download APK on this page, wait until the 3.9.9 file finishes, then open it from Downloads. Prefer Wi-Fi; on Grameenphone or Robi 4G, retry outside the busiest evening window if the transfer stalls.
How do I install wintk after downloading?
Open the APK, allow install from your browser or Files when Android asks, confirm version 3.9.9, then tap Install. When it finishes, open wintk from your home screen.
Is the wintk download free?
Yes. The APK listed here has no download fee. Skip pages that ask for bKash, Nagad, or Rocket only to unlock a so-called VIP APK.
Download stuck on mobile data — what next?
Switch to Wi-Fi if you can, delete the incomplete file, and download again. Dual-SIM users often use the stronger data SIM. The lighter ARM package can help when 4G is slow.
When should I re-download wintk?
Re-download if the file was interrupted, install says app not installed, you need a fresh 3.9.9 build after a failed update, or you cleared storage and removed the APK.
Where do I get help if install fails?
Open the Guide for unknown-sources and common Android errors. Use Official to confirm the channel, and Login after the app opens if you need an account.
Do I login before downloading?
No. Download and install first. Login or register inside the app after it opens. Never share OTP codes in WhatsApp or Messenger.