HSPA+ Explained: Meaning, Speed, and How It Compares to 4G and 5G

Mobile networks have changed dramatically since smartphones first arrived. Each generation brought faster speeds and better performance. HSPA+ was one of the most important steps in that journey. 

So what is HSPA, and why does it still matter? Here are the key points: 

• HSPA+ stands for Evolved High-Speed Packet Access. It measures and defines the internet speed of a mobile device. 
• It’s an upgrade from standard 3G. It sits between 3G and 4G in terms of performance. 
• HSPA+ speed can reach up to 42.2 Mbps — a significant leap from older 3G technology. 

Let’s break down how it works and where it fits in the wider mobile network picture. 

What Does HSPA Mean? 

HSPA meaning starts with its roots. It’s an upgraded version of 3G mobile technology, also known as W-CDMA (Wideband Code Division Multiple Access). 

HSPA is made up of two components: 

• HSDPA — High-Speed Downlink Packet Access (data coming to your device) 
• HSUPA — High-Speed Uplink Packet Access (data sent from your device) 

Together, they form HSPA — a faster, more efficient version of the standard 3G network. 

HSPA+ takes this further. It uses more advanced signal modulation — specifically 64 QAM on the downlink and 16 QAM on the uplink. These replace the older QPSK technique used in basic W-CDMA systems. The result is significantly faster data transfer. 

Standard W-CDMA achieves speeds between 384 Kbps and 2 Mbps. HSPA+ speed, by contrast, ranges from 14 Mbps up to 42 Mbps depending on conditions. That’s a substantial difference in real-world performance. 

The upgrade also allows mobile operators to get more value from their existing 3G infrastructure before committing to a full LTE rollout. HSPA+ uses a 5 MHz channel bandwidth, with 3.84 MHz actively used for data and the rest acting as a buffer between channels. 

Networks That Use HSPA 

Any mobile operator running a 3G network can support HSPA technology. Major carriers including T-Mobile, AT&T, Sprint, and Verizon have all offered HSPA+ in areas where 4G LTE coverage isn’t available. In those zones, 3G HSPA fills the gap and keeps data speeds acceptable for everyday use. 

Phone Compatibility with 3G HSPA 

Not every phone supports every network frequency. 3G HSPA networks typically run on frequencies of 850, 900, 1700, 1900, and 2100 MHz. Your device needs to support the right frequency to connect properly. 

This information is usually printed on the phone’s packaging or listed in the technical specifications. If you’re unsure, the manufacturer’s support team can confirm which frequencies your handset supports. 

Related Article: 5G and Beyond: All You Need to Know About 5G UC 

HSPA Technical Details 

Here’s a closer look at the key technical features that make HSPA+ work. 

16 QAM Uplink and 64 QAM Downlink 

HSPA+ uses 16 QAM modulation on the uplink. This allows upload speeds of up to 11.5 Mbps. On the downlink, it uses 64 QAM — enabling download speeds of up to 21 Mbps. These modulation upgrades are what set HSPA+ apart from basic 3G. 

Continuous Packet Connectivity (CPC) 

CPC helps more users stay connected to the network at the same time. It also improves battery life on connected devices and strengthens the overall quality of the connection. This is particularly useful for low-data services like VoIP calls, where a stable connection matters more than raw speed. 

HS-SCCH-less Operation 

This feature reduces signalling overhead — the background communication that happens between your device and the network. It’s especially useful for small packet services like VoIP. Less overhead means a more efficient and responsive connection overall. 

HSPA vs LTE: Key Differences 

Key differences between HSPA and LTE: 

Speed Comparison 

HSPA speed sits clearly above standard 3G but below 4G LTE. Here’s how the generations stack up: 

Bandwidth 

Bandwidth determines how many users a network can handle at once without slowing down. The more bandwidth, the more people can use it simultaneously without losing speed. 

Here’s how each generation handled this: 

• 3G handled voice calls well during busy periods. But data speeds dropped noticeably when more users connected at the same time. 
• 4G handled video calls well during peak hours. Data speeds still suffered under heavy load, but less so than 3G. 
• 5G handles HD video streaming smoothly even during peak hours. It maintains strong performance regardless of how many users are connected. 

The rise of IoT (Internet of Things) devices is pushing many operators towards 5G SA (Standalone) networks to meet future demand. 

Security 

More connected devices mean more opportunities for fraud and hacking. According to recent research, 76% of businesses worldwide have been affected by phishing attacks. 

Here’s how security has improved across generations: 

• 3G has the weakest security. Users are more exposed to phishing and interception. 
• 4G encrypts calls and messages. It uses 128-bit encryption, which is a significant improvement. 
• 5G goes further with 256-bit encryption. It also encrypts user location and identity data — something 3G and 4G don’t do. It uses unique connections for every subscriber, making it much harder for attackers to spoof authentication. 

Interesting Read: 5G Nationwide vs. Ultra Wideband: Which One is Faster? 

Wrapping It Up 

HSPA+ was a genuine turning point for mobile data. It pushed 3G networks far beyond their original limits and helped bridge the gap to 4G. 

Understanding HSPA meaning and HSPA+ speed puts the wider story of mobile network development into context. 

Today, most users in the UK are connected to 4G or 5G. But HSPA and 3G HSPA still serve as a fallback in areas where newer coverage hasn’t reached. 

Knowing what you’re connected to (and what it’s capable of) helps you make better decisions about your device and your plan. 

For fast, reliable mobile connectivity, Talk Home Mobile offers strong UK coverage across 4G and 5G networks. Get in touch to find a plan that suits your needs.