Mobile plans are changing. There's now a large number of phone plans in Australia that have a speed limit, or speed cap. That is, a maximum speed they're capable of.
This is a big shift in the way that mobile plans are sold, and makes them similar to the NBN. You're not just picking a data allowance, you're picking your speed too.
This is a brave new world for mobile plans, so we're taking a look at the main speeds on offer to help you work out which is right for you.
Mbps stands for megabits per second, and is a universal method used to measure how fast data travels along the network. More Mbps means a faster connection, less means a slower one.
20Mbps mobile plans

20Mbps mobile plans are the slowest you'll get in Australia, but this speed is offered by just one provider: felix mobile. felix has a plan where you genuinely get unlimited data, but the catch is the 20Mbps speed cap.
While 20Mbps is slower than the speeds 4G is capable of (at least 50Mbps in metro areas), it's still fast enough for almost everything you'd want to do on your phone. You won't have any issues scrolling through socials or streaming video.
20Mbps might feel a bit slow if you're regularly downloading apps on the go or using your phone as a portable hotspot.
Here is felix's unlimited plan plan:
100Mbps - 150Mbps mobile plans
100Mbps and 150Mbps plans have become the standard for almost every provider powered by the Telstra network. Cheaper plans from telcos like Superloop, Exetel, and Everyday Mobile are all subject to a 100Mbps speed cap.
You can get a little more speed by opting for a prepaid plan from Telstra, Belong, Boost Mobile, Tangerine, or More. Most of these plans are capped to 150Mbps.
Optus also limits the majority of its prepaid plans to 150Mbps. On the Optus MVNO front, Southern Phone's 5G SIM-only plans and all of amaysim's plans are capped at 100Mbps, as are most Swoop and Moose Mobile plans. Aussie Broadband and Yomojo have faster 150Mbps plans available.
These plans have speeds equivalent to or faster than an NBN 100 plan, making them plenty fast for almost any mobile use case - especially given you're typically only using your phone for one thing at a time.
If you see a plan with speeds capped to 100Mbps or 150Mbps, don't be put off by this. It will still be more than fast enough for anything you can do on your phone.
Here's a selection of plans with either a 100Mbps or 150Mbps speed cap:
250Mbps mobile plans
250Mbps plans have become a "premium" option on Telstra-powered providers, as well as the speed cap on Telstra's entry-level Upfront plan. Optus' most expensive 28-day prepaid recharge also has a 250Mbps speed cap, as do the most expensive recharges from iiNet and TPG.
In general, most of us won't benefit from upgrading from a 100Mbps or 150Mbps plan to a 250Mbps plan - at least in terms of speed. The main reason we'd take the higher speed plan is if you also need the larger data allowance it comes with.
Mobile broadband plans on smaller Telstra network providers also tend to be capped to 250Mbps.
Here's a selection of mobile plans with a 250Mbps speed cap:
Uncapped mobile plans
Until recently, uncapped plans were the industry standard. An uncapped plan allows download speeds as fast as your network type and network coverage allow. For example, we've seen speeds over 1Gbps on the Telstra 5G network.
The speeds you get on an uncapped plan will depend on your provider, your coverage, and your device. While an uncapped Telstra plan can get stupidly fast speeds on 5G, an uncapped plan from Vodafone with a 4G-only device might only get you speeds as fast as 100Mbps, for example.
If you're picking between a plan with a speed cap and an uncapped plan on the same provider, we'd typically recommend the capped plan - unless you need the extra data on offer from uncapped plan.
Here's a selection of uncapped mobile plans with at least 20GB:
How to check your current mobile internet speed?
You can use the tool below to find out what internet speeds you're currently receiving on your phone. Just make sure you disconnect from your WiFi so you're actually testing your mobile connection, rather than your internet.
What affects mobile internet speeds?
Mobile internet speeds are far more prone to fluctuation than NBN speeds. Just because you're paying for a 100Mbps plan doesn't mean you'll see 100Mbps all the time.
By and large, two main factors impact mobile internet speeds: coverage and congestion.
If you're in a poor coverage area or too far away from a mobile tower, you're going to see slower speeds than you would in ideal conditions. Similarly, if too many people are using your mobile network of choice at the same time, you might experience slower speeds due to congestion.
The device you're using and whether you're connected to a 4G or 5G network will also impact your mobile speeds.
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