Device limits are where multi-device users slip up most often: a plan page states a fixed number of devices, yet you can actually sign in on more; other providers advertise 'unlimited devices' but drop the oldest connection once a few devices are online at the same time. The difference isn't the size of the number — it's how that number is counted.
Below we break down the three common counting models, explain how many slots a router takes and what the server does when you go over the limit, then give a checklist for families sharing one account and a plan comparison by data allowance.
Device Limits: The Three Common Counting Models
The 'number of devices' written into the terms comes down to just three counting methods in practice. Before you buy, it matters more to know which method is used than to compare the headline number: a binding-style account with a high cap can feel tighter day to day than a concurrent-connection account with a lower one.
| Model | How it's counted | Typical behavior | Impact on sharing |
|---|---|---|---|
| Simultaneous connections | Counts the devices connected at the same moment; disconnecting frees the slot | When a new device connects, the oldest connection is dropped | Only limits the same moment; staggered use works best for a family |
| Account-bound device slots | The first sign-in takes a slot; it's only freed by unbinding manually | Switching devices or reinstalling the OS can eat a slot | The more members, the more likely you get stuck; someone has to manage unbinding |
| Data-capped, devices unlimited | Device count isn't tracked; only the account's data usage is | Connect as many devices as you like; they all draw on the same data pool | No device worries, but you have to watch the data pool |
There are two ways to tell which model applies, and neither requires asking support. First, read the wording: 'simultaneous connections' points to the first, 'you can bind N devices' to the second, and a policy that mentions only data and never device counts to the third. Second, test it: keep two devices connected, sign in on a third, and if one of the first two drops, you're on the simultaneous-connection model.
How Many Devices Does a Router Count As?
What the Server Sees
When a proxy client runs on the router — common on firmware like OpenWrt that accepts add-on packages — the server sees one connection and one exit address under your account, not the number of devices sitting behind the router. That's why most providers count it as a single device rather than tallying up every TV, tablet, and computer connected to it.
Two Conditions
- The terms allow it. Some providers ban router sharing in their terms or require a separate router license, so check this before you subscribe.
- Firmware support. The router firmware needs to be able to install a proxy core or import a subscription link directly — stock firmware usually can't. Before importing, check which protocols the core supports; the common ones — Shadowsocks, VMess, Trojan, VLESS, Hysteria2, TUIC — aren't always all covered.
Also, when the router runs transparent proxying, routing rules decide which traffic goes through the proxy and which connects directly. Get the rules wrong and local video services and OS updates take the long way around through the proxy, multiplying your data use. For a multi-device household, it's best to run the router for a week first and look at the traffic curve before choosing a tier.
What Happens When You Exceed the Limit
Providers handle going over the limit in different ways, but they mostly fall into the patterns below.
- First in, first out. When a new device connects, the longest-standing connection is dropped. The dropped device usually tries to reconnect automatically, so the two devices keep knocking each other offline — which shows up as an internet connection that works, then doesn't.
- New connections refused. The server rejects the device that goes past the cap, while devices already connected are unaffected. The client usually reports a connection or authentication failure.
- Throttling or downgrade. The connection goes through, but speed is squeezed hard — common on plans that tie device count to bandwidth.
- An upsell prompt. The dashboard shows the device slots are full and points you toward buying extra slots or a higher tier.
- Risk-control flags. If you repeatedly go over the limit in a short window, or many different exit addresses come and go, some providers temporarily freeze the account and require you to contact support.
The first and fifth are the ones to watch out for. The first throws no error — it just makes the connection unstable, which is easy to misdiagnose as a problem with the route. The fifth cuts off the whole family at once.
Can a Family Share One Account?
Technically yes, with three conditions: the terms allow family sharing, device limits are counted by simultaneous connections, and the data pool is big enough for everyone. Miss any one of them and things break down during the evening peak.
A household's peak concurrency usually lands in the evening: TVs, tablets, computers, and phones all online at once — five or six devices is not unusual. If the cap isn't high enough during that window, devices start bumping each other off.
Before Sharing: Check These Points
- ✅ The terms allow family sharing, with no requirement that everyone lives at the same address or is the same person
- ✅ Device limits are counted by simultaneous connections — disconnecting frees the slot — not by bound device slots
- ✅ The data pool is big enough for everyone; TV streaming and cloud-drive sync are the two biggest drains
- ✅ Every member knows how to disconnect properly in the client instead of just closing the window
- ❌ The account password sits in the family chat forever and is never changed when someone leaves
- ❌ A router runs 24/7 holding a slot that nobody is actually using
- ❌ Watching device counts but not data: at published bitrates, 4K streaming runs about 7GB per hour and 1080p about 3GB
Sharing has another cost: control. The password circulates among members, anyone who changes it disconnects the whole family, and if nobody rotates it after a member leaves, the account stays open. Signing up takes only a username and password — no email address required — so there's no need to share a mailbox just to receive messages. On privacy, this site takes a no-logs position; but when several people share one account password, control is shared too. Those are two separate things.
Multi-Device Use: How to Pick a Plan
The order should be: estimate concurrent devices first, then monthly data, and look at price last. Device count decides whether the cap is high enough; data decides whether there's enough to go around.
| Plan | Data | Price | Best for multi-device use |
|---|---|---|---|
| Monthly · 60GB | 60GB / month | ¥9.9 / month | One person, 1–2 devices — phone plus computer, mostly browsing and documents |
| Monthly · 250GB | 250GB / month | ¥18 / month | 3–5 devices including a tablet and a TV, with occasional HD video |
| Monthly · 500GB | 500GB / month | ¥28 / month | Whole family on multiple devices, with 4K streaming and cloud-drive sync |
| Data pack · 300GB | 300GB, never expires | ¥158 | Usage concentrated in a few months; no monthly renewal wanted |
| Data pack · 1000GB | 1000GB, never expires | ¥358 | One bulk purchase for the family; cheaper per person |
| Data pack · 3000GB | 3000GB, never expires | ¥658 | Long-term, high-frequency, heavy multi-device use |
Monthly plan data resets each month on your activation date; data packs have no expiry and last until they're used up, which suits households with uneven usage. Both accept Alipay, WeChat Pay, and USDT.
VPNFL is a case in point: there's no device cap, only a data limit. One account can be signed in on Windows, macOS, iOS, Android, and Linux at the same time, with no need to buy extra device slots.
FAQ and Conclusion
How Many Devices Can One Account Cover?
How many installs you have and how many devices are online at once are two different things. Most clients don't limit installs; the limit kicks in the moment a connection is established. The question worth asking is 'how many can be online at the same time', not 'how many can I install in total'.
What Happens When Two People Stream 4K at Once?
Data use doubles, and bandwidth gets split between them. A data-only plan won't disconnect you, but the pool drains fast; if the plan also caps bandwidth, the two devices slow each other down.
Are Data Packs a Better Deal?
If you're online every month with steady usage, a monthly plan is simpler; if your usage clusters around holidays or business trips, a data pack fits better, since it has no expiry and whatever you don't use carries over.