What is 5G? Speed, Coverage and How It Works in Singapore

5G is the fifth generation of mobile network technology, designed to deliver ultra-fast speeds, near-instant responsiveness, and the capacity to connect a massive number of devices simultaneously without congestion.

Singapore's 5G network delivers average download speeds above 340 Mbps - roughly 5 to 10 times faster than 4G on the same device. Beyond raw speed, 5G offers near-zero delay, ensuring seamless performance even in high-traffic areas.

With nationwide 5G Standalone (SA) coverage exceeding 95%, any 5G-enabled device and plan connects you instantly to one of the world’s most advanced mobile infrastructures.

Together, these technologies let 5G handle up to 1 million devices per square kilometre

4G supports around 100,000 in the same area. In a place like Singapore, where device density is among the highest in the world, this matters.

Why SA matters for your Battery

On NSA, your phone maintains connections to both 4G and 5G at the same time, draining the battery faster. On SA, your phone connects to a single 5G network, reducing the modem workload. Since Singapore's networks run on SA, 5G battery drain here is lower than in countries still using NSA.

1 Your video calls freeze or pixelate during peak hours

5G's lower latency and higher bandwidth keep video calls sharp and responsive, even in crowded areas. If you work from cafes or co-working spaces, this is where you notice the difference first.

2 You use your phone as a hotspot for your laptop

Tethering on 4G often feels sluggish for uploading large files or joining video meetings. 5G hotspot speeds are fast enough for most laptop tasks on the go.

3 You game on mobile and lag ruins the experience

5G latency sits between 8 ms and 15 ms in Singapore, compared to 30 ms to 50 ms on 4G. For competitive multiplayer or cloud gaming, the lower response time is noticeable on every action.

4 You download content for offline use on the go

Downloading a playlist, a Netflix episode, or a large work file takes seconds on 5G instead of minutes. If you regularly grab content before commutes or flights, 5G saves time every day.

✓ Use 5G Auto or Smart Data mode

iPhone (5G Auto) and Android (Adaptive Connectivity) switch to 5G only when the speed improvement is worth the extra power. This is the single most effective battery-saving setting.

✓ Connect to WiFi when available

WiFi uses significantly less power than any cellular connection because the signal source is much closer to your device. At home or in the office, WiFi is the most battery-friendly option.

✓ Keep your phone software updated

Apple and Android regularly release updates with 5G power management improvements. Running the latest OS version ensures your phone handles 5G as efficiently as possible.

Low Power Mode disables 5G on some iPhone models

If you have turned on Low Power Mode in Settings > Battery, your iPhone falls back to LTE until you turn it off.

👉 Apple's Official Guide to using 5G with your iPhone

No 5G option in your settings?

Your phone needs 5G hardware. iPhones before the iPhone 12 and older Android phones without a 5G modem do not support 5G through a software update. You also need a 5G-compatible SIM or eSIM and an active 5G Unlimited+ Plan.

Coverage is expanding to underground MRT stations, and many already have 5G signal. In stations without 5G, your phone falls back to 4G LTE automatically. You do not need to change any settings.

5G does not consume more data for the same activity. Streaming a 1080p video uses the same amount of data on either network. Faster speeds sometimes cause apps to load higher-quality content by default (4K instead of 1080p), which uses more data. You control this through individual app settings.

All 3G networks in Singapore have been fully shut down. The radio frequencies previously used by 3G have been reallocated to 4G and 5G. If you are still using a 3G-only device, it will no longer connect to mobile data in Singapore.

You need a SIM or eSIM compatible with 5G Standalone. New StarHub sign-ups receive one automatically. If you signed up before the SA rollout and are not getting 5G, contact StarHub support for a replacement SIM at no cost.

The 5G icon means you are in range of a tower, but actual speed depends on signal strength and network load. Try toggling Airplane Mode to force a fresh connection. Also, check if Low Power Mode is enabled, as it throttles 5G on many devices.

StarHub has enabled 5G roaming in selected destinations including Hong Kong, South Korea, Thailand, and parts of Europe. In countries without 5G roaming, your phone connects to the local 4G network instead.