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VoIP vs Cellular: What’s the Difference? (Updated 2025)

What is VoIP & how does it work?

VoIP is a communication technology that has transformed how we make and receive calls. Traditional landline systems rely on copper wires, whereas VoIP uses the internet to transmit voice data.

When you speak, the VoIP system converts your voice into small data or IP packets, encrypts them for protection services, and then sends them through a stable Wi-Fi connection. As long as the internet is available, the quality will be crisp.

You can also have different international VoIP numbers, sitting in one place.

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What is cellular & how does it work?

Cellular technology is the most basic way of communication, which uses a network of interconnected towers (cells) to transmit signals to and from your mobile devices. Each cell covers a specific geographic area.

When you place a call, your phone gets connected with the nearest cell tower in its area, after which the call gets routed through a sequence of network of towers and services to reach its final destination.

What Is Cellular

VoIP vs Cellular: Cost Comparison

When we talk about the cost of using VoIP vs cellular, cellular services tend to be more expensive than VoIP systems. Let’s have a look at the detailed breakdown:

VoIP:

Subscription fees for VoIP in the UK typically range from £7 – £50 per user. The range includes various packages for everyone. The basic package, which comes with basic features like VoIP calls, comes at the lower end of the range. While more expensive packages at the higher end will all you to have virtual phone numbers, ring groups video conferencing, etc.

Other than VoIP packages, you might also need to consider buying IP phones, VoIP adapters, ethernet cables, and headsets included in the
VoIP phone system costs. But this one-time hardware expense quickly pays off.

Another amazing benefit of VoIP is its lower prices for international calling. Out-of-the-country calls can get expensive if you dial them with a cell, while the VoIP ones are considerably cheaper if not free most of the time.

Cellular:

Cellular plans come with a higher monthly cost and often pack hidden charges. While you get free unlimited calls on that package, the real dent in your wallet is the international calls. They can quickly inflate the bill. Imagine a travelling sales executive racking up hours of international conversations – these costs will reflect heavily in your month-end account sheets.

VoIP vs Cellular: Call quality

VoIP vs Cellular Call Quality

When it comes to VoIP vs cellphone call quality, both have their strengths and limitations.

VoIP:

  • VoIP technology works best with a stable Internet connection. So the quality is ultimately dependent on how reliable your internet connection is.
  • VoIP is an advanced technology that uses codecs to compress and decompress audio. This helps maintain the quality of the voice while transmitting it.
  • VoIP performs well in handling multiple calls simultaneously within a business environment. You can add and remove users, expand your network or contract it with time. Also, it can integrate backup connections so that when option A is down, option B can quickly take over. Cellular lacks this option to pre-plan and redirect.

Cellular:

  • Cellular networks rely on tower proximity. This means the closer you are to the tower, the better quality calls you can make and receive. In urban areas, coverage is better than in rural areas because there is established infrastructure and more cellular towers over a greater distance.
  • On the bright side, since cellular isn’t tied to internet speed, it’s reliable in areas with weak or no internet connectivity.

VoIP vs Cellular: Mobility & accessibility

VoIP vs Cellular Mobility

Let’s compare the mobility and accessibility of the two technologies.

VoIP:

  • With VoIP, your device becomes a portable phone line through softphones and mobile apps. All you need is a VoIP package and an internet device. Without it, VoIP will not function, which may disrupt your basic communications.

Cellular:

  • Cellular technology excels in mobility because it leverages extensive cellular networks present in the UK to provide coverage across cities and rural areas.
  • Suitability for on-the-go communication: Cellular’s independence from internet connectivity is a reliable choice for field teams, sales professionals, and employees handling global operations.

VoIP vs Cellular: Features & functionality

Now let’s touch a bit on the features of both competitors.

VoIP:

One of the biggest advantages of VoIP is its helpful features. From call forwarding that ensures no missed connections to voicemail-to-email functionalities that let you check messages on the go, VoIP is built for versatility.

Need a video meeting with a global client? With Wi-Fi and VoIP’s video conferencing capabilities, you’re just a click away from face-to-face interactions. You can, of course, do the basic VoIP texting as well.

Moreover, it integrates seamlessly with CRM tools, project management software and analytics platforms. This allows businesses to track communication metrics, enhance workflows and achieve greater cost savings.

Cellular:

Cellular networks shine in simplicity and reliability. Standard calling and texting are staples, and many carriers now offer business-specific plans that help you call international numbers without excessive charges.

It can help your employees handle calls without worrying about the internet. However, the lack of integration capabilities with business applications may limit your team’s functionality.

VoIP vs Cellular: Safety considerations

Cellular networks are more secure than VoIP systems generally, but let’s discuss this debate in detail below.

VoIP:

When using VoIP instead of cell phone technology, it’s helpful to know that it relies on advanced encryption protocols to safeguard your data. However, its dependency on the internet introduces vulnerabilities, which makes it a target for cyber threats like phishing and DDoS attacks.

To counter this, businesses must invest in secure networks, firewalls and regular software updates.

Cellular:

Cellular communications provide built-in protection against threats like eavesdropping and unauthorised access. While they’re not invincible, they benefit from decades of development and thus offer reliable protections. Also, they’re not exposed to cyber threats as they’re not reliant on an internet connection.

Being that said, issues like SIM swapping and signal interception remain potential threats.

A comparison table is given below for your convenience.

VoIP vs Cellular: Comparison table

Aspect VoIP Cellular

Cost

Lower costs; subscription fees range from £7–£50 per user. Low-cost or free international calls; requires one-time hardware investment.
Higher costs with hidden charges for roaming and international calls; simpler pricing for domestic plans.

Call Quality

Depends on internet stability; excellent with high bandwidth. Noise-cancelling features and advanced codecs improve clarity.
Depends on tower proximity; excellent in urban areas but poor in rural locations. Not tied to internet connectivity.

Mobility & Accesibility

Portable with softphones and mobile apps; requires stable internet connectivity.
Wide-area coverage independent of internet, making it reliable for on-the-go teams.

Features

Advanced features like call forwarding, voicemail-to-email, video conferencing; integrates with CRMs and analytics tools.
Standard calling and texting; lacks integration with business tools but offers reliable communication.

Safety considerations

Uses encryption for security; vulnerable to cyber threats like DDoS attacks. Requires secure networks and updates.
Built-in carrier security; less exposed to cyber threats but susceptible to SIM swapping and signal interception.

VoIP vs Cellular: Which one is better for your business?

Comparing VoIP & Cellular

When VoIP is better for your business:

  • If your business prioritises cost savings.

  • If your business needs advanced features like voicemail-to-email and video conferencing.

  • If you have remote or hybrid teams that can benefit from the flexible solution offered by VoIP like softphones and mobile apps (WhatsApp, for example).

  • If your business requires frequency adjustments in communication lines, as VoIP packages can be scaled.

When cellular is better for your business:

  • For field professionals, sales teams or employees who are constantly on the move, as cellular communication offers unmatched mobility.

  • In locations with poor internet connectivity, as it’s not reliant on an internet connection.

  • For businesses handling sensitive data, as it has in-built protections.

  • If your business mainly needs standard calling and texting.

Switch to VoIP phone system With ComparedBusiness

At ComparedBusiness, we streamline the process of linking businesses like yours with VoIP service providers. Simply provide your business details in under 2 minutes, and we’ll promptly supply you with quotes from reputable VoIP providers across the UK. This will cost you nothing.

FAQs

VoIP is better for businesses needing cost-effective communication, advanced features and integration with tools like CRMs. However, cellular networks excel in mobility, wide-area coverage and reliable connectivity in areas with weak or no internet. The choice depends on whether you prioritise flexibility and features (VoIP) or on-the-go accessibility (cellular).

A key disadvantage of VoIP is its reliance on a stable internet connection. Poor or inconsistent Wi-Fi/broadband can lead to dropped calls or reduced quality. That being said, it has numerous benefits – you have to weigh both based on your business needs.

VoIP can replace a cellphone for businesses prioritising cost savings and features like voicemail-to-email or video conferencing. However, it needs internet connectivity, which limits mobility when compared with cellular technology. For highly mobile users or areas with weak internet, cellular networks remain essential.

Written by:

Picture of Isabella Robinson
Isabella Robinson
Isabella Robinson is a seasoned business content writer, leveraging several years of experience to craft impactful narratives that seamlessly blend business insights with engaging storytelling across diverse industries. Her expertise lies in delivering compelling content that resonates with audiences.

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