Coverage Targets: IMDA set regulatory targets for the two initial nationwide 5G SA networks to achieve 95% outdoor coverage by the end of 2025 (for Singtel). That includes all Singtel MVNO, such as ZYM Mobile.

🛜 5G Standalone (5G SA), also known as 5G+, is the final, dedicated architecture for 5G.

Previously, the initial 5G Non-Standalone (NSA) networks relied on the existing 4G core network for control (like the network's main computer). 5G SA completely separates from 4G by using a new, dedicated 5G Core (5GC). It's this dedicated 5G infrastructure (sometimes called "True 5G") that finally unlocks all the advanced features of the technology.

🛜 5G+ network deploys the 700 MHz spectrum. This low-band frequency significantly improves coverage in high-rise buildings, underground areas (like MRT tunnels), and remote regions, increasing signal strength by up to 40% in challenging locations.

Here's a breakdown of what you can generally expect:

Standard 5G (typically low-band): Offers better coverage but speeds are often only moderately faster than 4G LTE, often ranging from 50 Mbps to 250 Mbps in real-world conditions.

✅ 5G+ (High-Speed Mid-band and mmWave): This is where you see the biggest speed jumps. 5G+ can offer speeds that are several times faster than standard 5G.

✅ Reported speeds are often in the range of 300 Mbps to over 1 Gbps (Gigabit per second) for downloads.

The distinction between 5G Standalone (SA) and 5G Non-Standalone (NSA) hinges on their core network dependency:

🛜 5G NSA (Non-Standalone): This is a transitional phase. It utilizes the existing 4G Core network (EPC) to anchor its control and signaling functions. While it adds 5G radio access to boost data speeds, its capabilities are still limited by the underlying 4G foundation.

🛜 5G SA (Standalone): This is the final, true 5G architecture. It operates fully independently using a brand-new, cloud-native 5G Core (5GC).

Unlocking Full 5G Capability
The complete separation from 4G is what makes the difference. 5G SA is the only deployment that unlocks the full promise of the technology, delivering:

✅ Ultra-Low Latency: Essential for mission-critical applications like autonomous vehicles and real-time industrial automation.

✅ Massive Device Support: Ability to connect exponentially more devices simultaneously.

✅ Advanced Features: Enabling services like Network Slicing (creating dedicated, tailored network segments) and Voice over New Radio (VoNR)

Yes, upgrading to a true 5G SIM card is required to fully access and benefit from 5G+ in Singapore.

While your current 5G SIM works with the initial 5G Non-Standalone (NSA) network (which is still anchored to the 4G core), the new 5G+ is built on the advanced 5G Standalone (SA) architecture with a completely new, dedicated core network.

✅ The specialized 5G SIM is essential because it holds the necessary security credentials and network features to properly register onto the new 5G SA core.

✅ The upgrade ensures you can unlock the full potential of 5G+, including game-changing features like ultra-low latency, network slicing, and maximum speeds.

Due to security concern, you may exchange for a true 5G SIM at the below selected retail venue only.

✅ ZYM HQ - 53 Ubi Crescent, Singapore 408594
✅ Samsung Experience Store - J.E.M, Vivocity, Plaza Singapura, Bedok Mall or Serangoon Nex
✅ Singtel Exclusive Store - Junction 8, Compass One, Orchard ION or Harbourfront

⭐ Yes, you absolutely must use a 5G device with the True 5G SIM to access the high speeds and low latency of the 5G+ network.

🛜 It depends. Most 5G-compatible devices will continue to display "5G," but a small number of devices will show the "5G+" network indicator.

⭐ Using an app like NetMonster may confirm that you're on 5G+ (5G SA) or 5G (NSA) network.

🛜 If you are currently on a 5G plan, please note that you MUST exchange your SIM card for a true 5G SIM to maintain 5G network access.

This is due to an IMDA REGULATION that requires the older 5G Non-Standalone (NSA) network to be ceased islandwide by December 31, 2025.

What this means for you:

✅ If you are on a 5G plan, your current SIM card is only compatible with the retiring NSA network. To connect to the permanent, advanced 5G+ (Standalone) network, you need the new 5G SIM, which holds the necessary credentials. Failure to upgrade the SIM will result in a fall-back to 4G service.

✅ If you are on a 4G plan, no immediate action is needed, and you will continue to enjoy 4G service. However, if you decide to upgrade to 5G+ one day, you will then be required to switch to the new 5G SIM. So, it is better to make the switch asap.

To help you transition to the full capabilities of the 5G+ network, we are providing a one-time, complimentary exchange of your current SIM card for a true 5G SIM.

Be sure to claim your free SIM upgrade before the deadline of December 31, 2025.

🛜 Network slicing is a key feature of 5G SA. It allows the network to be logically divided into dedicated "slices" tailored for specific needs.

Though such features are not enabled in ZYM yet.

✅ Yes. Singapore's 5G network rollout is among the most advanced globally. The Infocomm Media Development Authority (IMDA) has driven operators to achieve widespread 5G Standalone (SA) coverage. We had achieved over 95% nationwide 5G SA coverage ahead of the regulatory target.

✅ Yes. To enjoy the full benefits, including the features of 5G Standalone (SA), you need a 5G SA-compatible device. This typically includes newer flagship phones (e.g., iPhone 14/15 or later, and most recent Android flagships). You will also need a 5G SA-compatible SIM card or eSIM.

The short answer is YES.