Free Wi-Fi can be good enough for client calls, but only if the connection behind it has decent upload speed, stays stable when the room fills up and keeps running when the power goes. The word "free" tells you none of that. If you work with international clients from Karachi, a frozen screen in the middle of a pitch costs more than a month's desk fee. Check a connection before you rely on it.
Here is what to look for, how to test it in about ten minutes, and what to do when things go wrong anyway.
Why free Wi-Fi is not the same as reliable internet for work
Almost every café, hotel lobby and coworking space in Karachi advertises free Wi-Fi. The price is not the problem. The problem is what sits behind the network name:
- Who you are sharing it with. A single home-grade connection split between 30 people streaming, downloading and calling behaves very differently at 11am than it did when you checked it at 9.
- Whether it survives load-shedding. If the router and network equipment are not on UPS, the Wi-Fi disappears the moment the power does, even if the lights come back on a generator a minute later.
- Whether there is a second line. Every ISP has outages. With one connection, an outage means you are off the call.
- Upload, not just download. Most connections are sold on download speed. Video calls and file deliveries depend on upload, which is often much lower.
This is the main reason a coworking space usually beats a café for everyday work: a space built for work should have planned for these things. Still, check rather than assume.
What speed and stability you need for video calls and large uploads
You need less raw speed than most people think, but more stability. The figures below are rough rules of thumb based on what common call apps such as Zoom, Google Meet and Teams tend to use. Treat them as a minimum for you alone, and remember everyone else on the network is using bandwidth too.
| What you are doing | Rough upload needed | Rough download needed |
|---|---|---|
| Audio-only call | Under 1 Mbps | Under 1 Mbps |
| One-to-one HD video call | 2–4 Mbps | 2–4 Mbps |
| Group video call with screen sharing | 3–5 Mbps | 4–8 Mbps |
| Uploading large files (video, design files, builds) | 10 Mbps or more makes a real difference | Less critical |
Speed alone is not enough. Three other numbers matter more for calls:
- Ping (latency): under about 100 ms is comfortable. Much higher and you start talking over each other.
- Jitter: how much the ping varies. Under about 30 ms keeps audio smooth. High jitter causes robotic voices and frozen frames, even on a "fast" connection.
- Packet loss: should be close to zero. Even a small percentage makes calls choppy.
A 50 Mbps connection with spiky jitter will give you a worse call than a steady 10 Mbps one.
How to test a coworking space's connection during a visit
Don't just ask "how fast is your internet?" Test it yourself, ideally on a trial day when you can work normally.
- Go at a busy time. Late morning or early afternoon on a weekday shows the connection under real load. If you work US hours, visit in the evening too.
- Test from the seat you would actually use. Wi-Fi can be strong near the router and weak two rooms away. Check the meeting rooms as well.
- Run a speed test, then run it again. Use Speedtest or Fast.com and note download, upload and ping. Repeat after 20–30 minutes. Big swings are a warning sign.
- Make a real test call. Call a friend on Zoom or Meet for ten minutes with video and screen sharing on. Ask whether you froze or dropped. Most apps also show connection stats during a call.
- Upload something heavy. Push a large file to Google Drive or Dropbox and time it. If you deliver videos or design files, this tells you more than any speed test.
- Check your work tools. If you use a VPN, a client's remote desktop or specific software, confirm it works on the network.
- Watch what happens during a power cut. If load-shedding hits while you are there, see whether the Wi-Fi stays up through the switchover.
Questions to ask the space about backup connections and power
A good community manager should answer these without hesitation:
- How many internet connections do you have, and are they from different providers? Two lines from the same ISP can fail together.
- If the main line drops, does the backup take over automatically, or does someone have to switch it?
- Are the routers and network equipment on UPS, so Wi-Fi stays up while the generator starts?
- Is a wired connection available for important calls?
- Is there a bandwidth cap or fair-use limit per member?
- Where can I take a call without disturbing others, and can I book a room at short notice?
- If the internet goes down at night or on a weekend, who do I contact?
Vague answers like "it's usually fine" are a signal to test more carefully.
What to do if the connection drops during an important call
Even the best setup can fail. Pakistan has seen nationwide slowdowns and undersea cable faults that no single building can fully protect against. What matters is how quickly you recover.
Before the call:
- Keep a mobile data package active on your phone, ideally on a different network from the space's main ISP, and know how to turn on a hotspot in seconds.
- Charge your laptop and phone fully so a power blip doesn't take your device down too.
- Send the agenda, deck or files to the client in advance so the meeting can continue even if your screen share fails.
- Save the call's dial-in number, if it has one, so you can rejoin by phone audio.
During the drop:
- Switch to your hotspot and rejoin straight away. Don't wait to see if the Wi-Fi comes back.
- Turn your video off if the connection is weak. Clients care far more about hearing you clearly than seeing you.
- Send a quick message on WhatsApp, Slack or email: "Connection dropped, rejoining in one minute."
- If you can't get back on, offer to continue by phone or reschedule the same day, and follow up with written notes.
Handled calmly, a dropped call rarely damages a client relationship. Disappearing without a word does.
Where to work when you need a guaranteed connection
No internet connection is truly guaranteed, but you can get close by stacking the odds: two independent lines, power backup that covers the network equipment, a quiet room and a mobile hotspot in your pocket.
Home can work if you have invested in a UPS, a backup connection and a quiet room. Cafés are fine for email but risky for client calls. A coworking space is usually the most practical option, as long as it passes the checks above.
At SandBox, both our Downtown (SMCHS) and Parkside (Gulshan-e-Iqbal) locations have high-speed internet with a backup line, power backup (generator/UPS) and 24/7 access, which matters if your clients are in the US or UK. You can see the full list of amenities and compare our two locations. For calls that really count, you can book a meeting room by the hour, starting from Rs.3,000/hour.
Desks start from Rs.22,000/month for a Flex desk with 24/7 access. If you mostly work night shifts for US clients, the Night Owl desk starts from Rs.18,000/month, with access from 8pm to 6am on weekdays and 24/7 on weekends. These are starting prices, so check the current plans and rates for details.
The simplest test is the one described above: come in, run your speed tests and make a real call. SandBox offers a free trial of up to 3 hours, so you can check the connection from your own laptop before you commit. Message us on WhatsApp at 03040445341 to book a slot.
Frequently asked questions
Is mobile data good enough as a backup for client calls?
Usually yes for audio and basic video, as long as you have a strong 4G signal where you sit. Keep a data package active, ideally on a different network from your main internet provider, and test your hotspot before you need it.
Should I use a VPN on shared Wi-Fi for client work?
If you handle sensitive client data or a client requires it, yes. Test the VPN during your trial visit, because some VPNs add latency that can affect call quality.
Is a wired connection better than Wi-Fi for calls?
A wired connection is generally more stable because it avoids interference and congestion on the wireless network. If a space offers one, use it for your most important calls.
Can I try SandBox's internet before signing up?
Yes. SandBox offers a free trial of up to 3 hours, so you can run speed tests and make a test call from your own laptop. Book via WhatsApp at 03040445341.
Which SandBox plan suits late-night calls with US clients?
The Night Owl desk starts from Rs.18,000/month with access from 8pm to 6am on weekdays and 24/7 on weekends. If you need daytime access too, the Flex desk starts from Rs.22,000/month with 24/7 access. See the pricing page for current rates.