Mobile Hotspot for Business: How to Tether Your Phone Safely

Last updated: 26th March 2026

A mobile hotspot turns your smartphone into a portable Wi-Fi router, sharing its mobile data connection with laptops, tablets, and other devices. For UK businesses, this is an increasingly vital capability — whether it’s a field engineer needing to update a job management system, a sales rep running a presentation at a client site, or an entire office using a phone as emergency backup internet when the broadband goes down. But tethering comes with data implications, security risks, and some important decisions about whether to use your phone or invest in a dedicated hotspot device. This guide covers everything you need to know.

What Is a Mobile Hotspot and How Does It Work?

A mobile hotspot — sometimes called tethering — is when your phone acts as a wireless access point. Your phone connects to the mobile network (4G or 5G) as normal, but instead of keeping that connection to itself, it broadcasts a Wi-Fi signal that other devices can connect to, just like a regular Wi-Fi router.

There are three ways to tether:

• Wi-Fi hotspot: The most common method. Your phone creates a Wi-Fi network that multiple devices can join. Works with any Wi-Fi-enabled device
• USB tethering: Connect your phone to a laptop via USB cable. This shares the data connection through the cable. Often more reliable and doesn’t drain the battery as fast since the phone charges from the laptop simultaneously
• Bluetooth tethering: Shares the connection via Bluetooth. Slower and less practical than Wi-Fi or USB, but uses less battery. Typically limited to one connected device

For business use, Wi-Fi tethering is the go-to method — it’s fast, supports multiple devices, and works across all platforms.

How to Set Up a Mobile Hotspot on iPhone

1. Open Settings
2. Tap Personal Hotspot
3. Toggle Allow Others to Join to on
4. Note the Wi-Fi Password shown — you’ll need this on the connecting devices. Tap it to change it to something more memorable (but keep it strong)
5. On the device you want to connect, open Wi-Fi settings and look for your iPhone’s name in the available networks list
6. Connect using the password and you’re online

By default, the iPhone hotspot uses WPA3/WPA2 security and supports up to 5 simultaneous connections. The hotspot automatically turns off after a period of inactivity to save battery.

iPhone Hotspot Tips

• To use USB tethering, connect the iPhone to a Mac or PC via Lightning/USB-C cable. The computer should recognise the connection automatically
• If the Personal Hotspot option is missing, contact your network provider — some plans require hotspot to be activated on the account
• On iOS 18 and later, you can set a custom hotspot name (separate from your device name) for easy identification on shared networks

How to Set Up a Mobile Hotspot on Android

1. Open Settings
2. Tap Connections (Samsung) or Network & internet (Pixel/stock Android)
3. Tap Mobile Hotspot and Tethering
4. Tap Mobile Hotspot to configure the network name and password
5. Toggle the hotspot on
6. On the connecting device, find the hotspot network name in Wi-Fi settings and enter the password

Samsung Galaxy Specific Steps

Samsung devices have additional hotspot features worth knowing about:

• Auto Hotspot: Automatically shares your connection with other Samsung devices signed into the same Samsung account — useful for company-issued tablets
• Wi-Fi sharing: If your Samsung phone is connected to Wi-Fi, it can share that Wi-Fi connection (rather than mobile data) via hotspot. This is useful in hotels where Wi-Fi access is limited to one device per room
• Band selection: Choose between 2.4 GHz (longer range, slower speeds) and 5 GHz (shorter range, faster speeds) for the hotspot
• Connected devices management: View and manage which devices are connected to your hotspot, and set a maximum device limit

How Much Data Does Tethering Use?

One of the biggest concerns with business hotspot use is data consumption. When you’re tethering a laptop, it behaves as if it’s on normal Wi-Fi — downloading updates, syncing cloud files, loading full desktop websites. This uses significantly more data than typical phone usage. Here’s what to expect:

The clear takeaway: video calls are the biggest data drain. A single group Teams call can burn through 2.5 GB in an hour. If employees are regularly tethering for video meetings, you’ll need unlimited or very high data plans.

Security Risks of Mobile Hotspots

Using a phone as a hotspot introduces security risks that businesses need to manage:

Weak or Default Passwords

If the hotspot password is simple (like “12345678”) or left as the device default, anyone nearby can connect and use your data — or worse, intercept your traffic. Always use a strong password: at least 12 characters mixing upper/lowercase letters, numbers, and symbols.

Man-in-the-Middle Attacks

On open or poorly secured hotspots, attackers can position themselves between your device and the internet, intercepting sensitive data. This is why WPA3 encryption (the default on modern phones) is essential, and why employees should never create open (no password) hotspots.

Rogue Hotspots

An attacker could create a hotspot with a similar name to a legitimate one (e.g., “Company_WiFi_2” vs “Company_WiFi”) to trick employees into connecting. Educate staff to only connect to hotspots they’ve created themselves or that come from known, trusted sources.

Data Leakage

When a laptop connects to a phone hotspot, it may begin syncing and sharing data it wouldn’t on a managed office network. Ensure laptops have firewall rules active and that sensitive file-sharing services aren’t set to auto-discover devices on the network.

Best Security Practices

• Always use WPA3 or WPA2 encryption with a strong password
• Change the default hotspot network name to something that doesn’t identify the company
• Limit the maximum number of connected devices
• Use a VPN on all devices connecting through the hotspot for encrypted traffic
• Disable the hotspot when not in use
• Regularly update the hotspot password

Dedicated Hotspot Devices vs Phone Tethering

For businesses with regular tethering needs, a dedicated mobile hotspot device (sometimes called a MiFi) may be a better solution than relying on phones. Here’s how they compare:

Business Use Cases for Mobile Hotspots

Understanding when and why your business might need tethering helps you plan the right mobile data provision:

Field Workers and Remote Sites

Construction managers, surveyors, estate agents, and delivery drivers frequently need internet access at locations without Wi-Fi. A phone hotspot lets them use laptops and tablets for CRM updates, site reports, and document access in the field.

Events and Trade Shows

Exhibition venues often charge premium rates for Wi-Fi, and the shared network can be unreliable with thousands of attendees. A dedicated hotspot device gives your stand reliable, private connectivity for payment terminals, live demos, and lead capture systems.

Emergency Backup Internet

When your office broadband goes down, a mobile hotspot can keep critical services running. It won’t replace a full fibre connection for a team of 30, but it can keep email, VoIP, and cloud apps accessible for key staff during an outage. Some businesses keep a dedicated MiFi device charged and ready specifically for this scenario.

Client Meetings

Presenting at a client’s office where the guest Wi-Fi is slow, requires sign-up, or has restricted access? A phone hotspot gives you independent, reliable connectivity for demos, screen shares, and video presentations.

Temporary Workspaces

Pop-up offices, co-working spaces without reliable Wi-Fi, or temporary project rooms — a hotspot device provides instant connectivity without needing to install broadband infrastructure.

Does Your Mobile Plan Include Tethering?

Not all mobile plans treat tethering data equally. Some networks include full tethering within your data allowance; others cap or throttle it:

• EE: Business plans generally include tethering within the data allowance. Unlimited plans may have a fair usage policy on hotspot usage (typically capped at 80–120 GB tethering)
• O2: Tethering is included in all O2 business plans using your standard data allowance. No separate tethering cap on most plans
• Three: Unlimited plans include unlimited tethering at no extra cost — one of the most generous policies among UK networks
• Vodafone: Business plans include tethering within the data allowance. Some unlimited plans have a tethering cap — check your specific terms

Always confirm your plan’s tethering policy before relying on it for business-critical connectivity. Connection Technologies can help you identify plans with the best tethering allowances for your needs.

Tips to Get the Best Hotspot Performance

• Use 5 GHz Wi-Fi when available: It’s faster than 2.4 GHz, though the range is shorter. Ideal when devices are close to the phone
• Position matters: Place the phone near a window for better mobile signal. Avoid putting it in bags or drawers while tethering
• Limit connected devices: Each additional device shares the bandwidth. Connect only what’s needed
• Set laptops as metered connections: On Windows, go to Wi-Fi settings, select the hotspot network, and toggle “Metered connection” on. This prevents Windows from downloading large updates over the hotspot
• Keep the phone charged: Tethering drains battery rapidly. Use USB tethering to charge and share data simultaneously, or keep a power bank handy
• Check signal strength: Hotspot performance is entirely dependent on the phone’s mobile signal. If you’re in a weak coverage area, performance will suffer regardless of settings

Related Help Guides

• Data roaming guide
• Wi-Fi calling guide
• Mobile security checklist
• best mobile network in the UK
• business mobile phone plans
• APN settings guide
• mobile signal checker

Related Reading

• Mobile Data Usage Guide for Businesses
• Best Business Mobile Phone Plans in the UK
• Business Broadband Guide