Fix It
Why internet is slow at night in Pakistan
Slow internet between 7 PM and 11 PM is a widespread complaint across Pakistan, affecting PTCL, fiber, and mobile users alike. This guide explains why it happens and what you can actually do about it.
Quick answer
Internet slows at night (7–11 PM) because ISPs have shared capacity — more users online means more congestion. Solutions: schedule heavy downloads for late night, contact ISP if consistently 50%+ below plan, consider upgrading to fiber.
Root Cause
Why evening slowdowns happen
Internet infrastructure is shared — the capacity of ISP exchanges, fiber nodes, and mobile towers is divided among all active users in a given area at any moment.
Evening hours (7–11 PM) see a surge in simultaneous usage as people return home from work and school, watch streaming content, and play online games.
When total demand exceeds the exchange or tower's capacity, every user's connection slows down — this is called network congestion and is the primary cause of nighttime slowdowns.
This problem affects all ISP types in Pakistan to varying degrees: PTCL DSL exchanges are often most congested, while fiber and mobile networks in dense areas also experience it.
ISP-Side Causes
What your ISP is responsible for
ISPs are responsible for provisioning adequate capacity at their exchanges and peering points. When an ISP oversells capacity relative to its infrastructure, users always suffer at peak times.
Some Pakistani ISPs use traffic shaping or throttling policies during peak hours, deprioritizing streaming and large downloads to maintain basic connectivity for all users.
International bandwidth costs are significant for Pakistani ISPs — some cut corners by under-purchasing capacity to major CDNs, slowing Netflix, YouTube, and gaming traffic specifically at night.
Document your slowdowns with SpeedTester.pk screenshots including timestamps. An ISP cannot dismiss a complaint that shows consistent 70–80% speed reduction every evening.
What You Can Do
User-side steps that help
Schedule large downloads, cloud backups, and updates for off-peak hours (midnight to 6 AM) to avoid congestion and take advantage of typically faster overnight speeds.
Switch video streaming to lower resolutions during peak hours — YouTube and Netflix allow manual quality settings, and dropping from 4K to 1080p reduces bandwidth demand significantly.
If you have dual-band WiFi, try switching between 2.4 GHz and 5 GHz bands during slow periods — congestion is not always uniform across frequency bands.
On mobile, try switching between 4G-only and 4G/3G auto in your network settings during congestion — sometimes connecting to a less-loaded 3G carrier improves throughput.
Long-term Solutions
Solving the problem permanently
If nighttime slowdowns are severe and persistent, file a formal complaint with your ISP, referencing speed test data. Under PTA guidelines, ISPs must deliver a reasonable portion of advertised speeds.
Compare your ISP's peak-hour performance against alternatives in your area. Some ISPs in the same city invest more in exchange capacity and maintain better evening performance.
Upgrading to a higher-tier plan sometimes helps — higher plans are occasionally on less-congested segments of the exchange infrastructure, though this is not guaranteed.
As the ultimate fix, switching to a different ISP or technology (e.g., fiber vs. DSL) may resolve persistent congestion issues if your current provider is chronically under-provisioned.