Network & Voice ·
Why Mobile Towers Slow Down - and How OpenWeb Priority Keeps You Moving
Learn why busy mobile towers can slow down, how OpenWeb Premium Priority and its three-PoP internet breakout help, and how Voice plans from R399 can cut calling costs.
You check your phone or router and see a strong 4G or 5G signal, yet a video buffers, a page takes too long to open or a work call suddenly feels less responsive. The signal bars have not disappeared, so what changed?
Very often, the answer is mobile tower congestion. A mobile tower serves a shared coverage area. When many homes, businesses and phones connect to the same tower at the same time, they compete for finite radio capacity. Peak evening streaming, a busy shopping district or a local event can all place extra pressure on that shared resource.
This is not just a marketing explanation. Ofcom's mobile performance guidance identifies local mast capacity and peak-time network congestion as factors that affect mobile service. The GSMA's quality-of-service guidance also explains that speed, packet loss, delay and jitter are affected by network load and changing traffic patterns.
Why full signal does not always mean full performance
Signal strength tells you how well your device can hear the tower. It does not tell you how many other customers are sharing that tower or how much traffic is moving through it. During a busy period, packets may wait longer to be transmitted. That can show up as lower throughput, increased latency, buffering or inconsistent performance.
Your distance from the tower, buildings, terrain, weather, router capability and radio conditions still matter. But when the tower itself becomes busy, the priority assigned to your service can make a meaningful difference.
OpenWeb's two-part answer: Premium Priority and our own internet breakout
OpenWeb tackles the journey in two places. First, we give stronger treatment at the shared mobile-network layer. Second, once traffic leaves the radio network, we carry it through our own core and internet breakout architecture.
Premium Priority for mobile packages above R600 pm
Every OpenWeb mobile client on a package priced above R600 per month receives Premium Priority on the tower they connect to. When the mobile network becomes busy, Premium Priority traffic is served ahead of standard-priority traffic. In practical terms, your request moves to the front of the queue when tower capacity is under pressure.
Priority does not pretend that a tower has infinite capacity. It decides which traffic receives preferential treatment when demand is high. This is exactly when a premium service should prove its value: not only when the network is quiet, but when everyone around you is trying to connect at once.
Our own Break Out to the internet
After traffic leaves the tower, routing still matters. OpenWeb operates its own Break Out to the internet through a core network spanning three South African Points of Presence, or PoPs, in Durban, Johannesburg and Cape Town. This gives us direct control over a larger part of the customer's route instead of simply handing every decision to a distant third party.
Shorter, more deliberate routing can reduce unnecessary network distance and help keep latency low. The result is an OpenWeb experience built around both access priority and intelligent onward routing.
"We have spent a significant amount of money on our core network which spans across three PoPs: 1. Durban, 2. JHB and 3. Cape Town, allowing users to experience the lowest latency possible. We are now also rolling out 5G AirFibre in Ballito and Salt Rock as a trial and will expand to areas that do not have Fibre coverage in the near future."
Compare OpenWeb MTN Mobile Plans
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OpenWeb Voice: a smarter phone bill from R399 pm
Connectivity is only half the story. OpenWeb Voice brings modern, 3CX-backed internet calling to individuals, professionals and businesses from just R399 per month. Instead of paying unpredictable call charges, customers can choose a plan with a clear monthly price and the call capacity their home or business needs.
Three of the four current OpenWeb Voice plans include Unlimited voice calls. Plans can include an incoming 087 number and support from one to four concurrent sessions. A concurrent session is simply one call that can be active at a time. One session suits an individual or small office making one call at a time; four sessions allow a team to handle up to four simultaneous incoming or outgoing calls.
Current OpenWeb Voice plans
- Voice 500 - R399 pm: 500 All Network Minutes, outgoing calls, one concurrent session and Standard Network Priority.
- Unlimited Voice Pro - R499 pm: Unlimited voice calls, one incoming 087 number, one concurrent session and Premium Network Priority.
- Unlimited Voice Business 2 - R699 pm: Unlimited voice calls, one incoming 087 number, two concurrent sessions and Priority Network Access.
- Unlimited Voice Business 4 - R999 pm: Unlimited voice calls, one incoming 087 number, four concurrent sessions and Priority Network Access.
The service is powered by 3CX and can support app-based calling on common mobile and desktop platforms, as well as compatible IP desk phones. Because calls run over the internet, a stable connection is important. OpenWeb can help customers choose the right plan, endpoint and concurrent-session capacity for the way they actually work.
How Dr Pillay saved more than R19,500
Real savings are where the numbers become meaningful. OpenWeb moved Dr Pillay from Ballito to OpenWeb Voice in 2025. Since then, he has saved more than R19,500 on his phone bill alone.
For a professional practice, predictable monthly calling can make budgeting easier while removing the anxiety of a large variable phone bill. The saving can be redirected into staff, equipment, patient care or the everyday costs of running a business. Dr Pillay's experience is a practical example of why moving voice traffic onto the right internet-backed plan can be far more than a technology upgrade.
Choose priority where it matters and savings where they count
A premium connection is not only about the largest advertised speed. It is about what happens during the busy hour, how traffic is treated at the tower, where it breaks out to the internet and whether the provider has invested in the core behind the service.
The same principle applies to calling. The right Voice plan should deliver the capacity you need, a predictable monthly cost and a clear path to meaningful savings. OpenWeb brings those two ideas together: priority mobile connectivity and modern cloud voice, backed by people who understand the network from the tower to the call.