Phone hotspot is free. It requires no extra hardware, no subscription, and for many people it works just fine. So why are thousands of MacBook users actively looking for a MacBook hotspot alternative?
Because "works just fine" doesn't mean "costs nothing." The hotspot experience has real trade-offs that compound every single time you use it. Battery drain. Heat. Distraction. Dropped connections. And the slow, annoying ritual of setting it up and tearing it down. The cost isn't money. It's time, attention, and the quiet degradation of your phone.
Let's look at the actual numbers.
What hotspot does to your phone battery
When you enable Personal Hotspot on an iPhone, the phone's cellular radio switches from low-power receive mode to active transmit mode — broadcasting a WiFi signal while simultaneously maintaining a 5G connection to the tower. This is metabolically expensive for a phone battery.
The 73% figure reflects real-world testing under moderate load: a MacBook doing video calls and web browsing, phone in a bag (no screen-on). In two hours, you've gone from a full phone to one that's critically low. Any work session that extends past lunch needs a charger in range — for both devices.
The heat is also a real concern, not just a curiosity. At 42°C surface temperature, iPhones trigger thermal throttling — the A-series chip reduces performance to protect the battery. If you're on a call while the hotspot is running, you may notice voice quality degrading or call drops. The phone is juggling too much thermal load.
The setup tax
There's also the ritual. Pull out phone. Open Control Center. Toggle hotspot on. Wait for MacBook to see the network. Click join. Wait for DHCP. Occasionally it connects quickly — more often it doesn't, and you tap your foot for thirty seconds while it figures itself out.
Then when you're done: toggle hotspot off (or your phone will keep broadcasting, draining battery). When you re-open your MacBook later, the hotspot isn't active anymore, so you do it again.
iPhone hotspot auto-disconnects after periods of inactivity to save battery. This means every time you close and reopen your MacBook, there's a reasonable chance the hotspot has gone to sleep and you'll need to re-enable it manually on your phone. In a meeting, on a deadline, or mid-video-call, this is genuinely disruptive.
Your phone is occupied
Perhaps the most underappreciated cost: when your iPhone is running a hotspot, it's doing a job. It's not fully available for calls, for navigation, for anything that requires the radios to be in a different state. Incoming calls during hotspot use can degrade the connection — the phone has to context-switch its radio resources between the call and the hotspot data stream.
More practically: your phone is out, visible, and likely to attract your attention. Every notification that comes in is one more potential distraction. You pulled your phone out to fix a connectivity problem, and now it's sitting face-up on the desk. This is a focus tax that's hard to quantify but easy to feel.
When hotspot works fine
To be fair: hotspot is fine for short bursts. If you're on a train for 20 minutes and need to reply to emails, enabling hotspot for a quick connection makes complete sense. You're not burning 73% of battery in 20 minutes. You're not overheating anything. It just works.
The problem is when hotspot becomes the default — when it's your plan for a four-hour café session, a full workday at a client site, or a long flight with WiFi outages. That's where the compounding costs become significant.
How Relay handles this differently
Relay is a USB-C 5G module that plugs directly into your MacBook. Your phone is not involved. The 5G connection lives in the Relay module itself — it has its own eSIM, its own cellular radio, and draws power from the MacBook's USB port (about 1.5W at idle, under 3W under load).
Plug Relay into any USB-C port. macOS sees it as a network interface — no drivers required. Within 3 seconds, you're connected to 5G. Your phone stays in your pocket, at 100% battery, doing nothing. No setup, no toggle, no re-enable after sleep. When you close your MacBook and reopen it, Relay is still connected.
The MacBook doesn't drain the Relay module — there's no battery in Relay. It's powered by USB. The USB port draws from your MacBook's battery, but at such low wattage that the impact is negligible compared to the CPU, display, or any other component.
Side-by-side comparison
| Feature | Phone Hotspot | Relay |
|---|---|---|
| Setup time | ~30 seconds | 3 seconds |
| Phone battery impact | 73% drained in 2 hours | None — phone not involved |
| Phone temperature | Up to 42°C (throttles) | Phone stays cool |
| Auto-reconnect on wake | Requires phone interaction | ✓ Always on |
| Phone available for calls | May affect call quality | ✓ Fully available |
| Data plan | Uses phone plan | Included (5GB or 15GB) |
| Appears in macOS Network | ✓ (as WiFi) | ✓ (as cellular interface) |
| Works during video calls | Usually — but can drop | ✓ Stable |
| MacBook battery impact | None | ~1.5W USB draw — minimal |
| Carrier | Your carrier | Unlocked (any carrier via eSIM) |
| Physical form | N/A | Flush to MacBook chassis |
| Upfront cost | Free | $125–$175 |
The honest calculus
If you use hotspot occasionally — a few times a month, for short bursts — it probably makes sense to keep using it. It's free and it works for light use.
If you rely on hotspot regularly — multiple times a week, for multi-hour work sessions — the math changes. You're compressing your phone's battery cycles every time you run extended hotspot sessions. You're dealing with heat. You're going through the setup ritual over and over. You're occasionally dropping connections at bad moments.
Relay solves all of that at once. Your phone stays out of the equation entirely. The 5G connection just exists, persists through sleep-wake cycles, and doesn't cost your phone a single percentage of battery. For anyone who works primarily on a MacBook and needs reliable connectivity away from WiFi, that's a meaningful upgrade.
For a full breakdown of how Relay compares to every other option — including MiFi pucks, TCL Linkport, and hotspot — see the comparison page. Or if you're ready, check the pricing and availability.
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