Using Singapore mobile proxies with MostLogin in 2026

MostLogin sells browser profiles from about $3 a month. Our cheapest dedicated Singapore port is $40 a month. That ratio catches people out, because it means the proxy is the expensive half of the setup, and it should be: the profile controls what a site reads from the browser, the proxy controls what it reads from the network. Only one of those two can be checked against a carrier’s public records.

This is the setup guide for pairing the two. It assumes you already have a MostLogin account and are deciding how to attach proxies to profiles.

what each side is actually doing

MostLogin isolates the browser. Each profile gets its own environment, its own storage, and its own device signature, so two profiles opened side by side on one machine don’t share cookies or a fingerprint. It also does the operational parts that matter once you pass about twenty accounts: batch profile creation, team seats with role-based access, extension management, and an API for driving profiles from your own code.

What it does not do is give you an IP. There is no bundled proxy pool. The connection comes from wherever you buy it, and its quality decides whether any of the fingerprint work matters.

That split is worth being blunt about. If you run a perfectly configured MostLogin profile through a datacenter IP, the platform reads the ASN before it ever evaluates your canvas hash. You lose at the network layer while winning at the browser layer. If you are new to the distinction, what is a mobile proxy covers it properly.

putting an SMP port into a profile

We hand over four values per port: host, port number, username, password. Every port speaks both HTTP and SOCKS5, so you pick the protocol at the MostLogin end rather than ordering a different port.

In MostLogin, open Profiles, select the profile, and go to its proxy settings. Choose the protocol from the dropdown, then paste the four values.

Proxy type:  SOCKS5   (HTTP also works)
Host:        <your SMP host>
Port:        <your port number>
Username:    <your SMP username>
Password:    <your SMP password>

SOCKS5 is the default we recommend, mostly because it passes the connection through without rewriting headers, which removes one place where the browser and the network can disagree about what they are. HTTP is fine and some people prefer it for debugging, since a failed CONNECT is easier to read in a log. Neither choice will get you banned. If you want the longer version, HTTP and SOCKS5 port setup goes through both.

Run MostLogin’s proxy check before you save. It will report the visible IP and country. You want Singapore, and you want the carrier to be one of ours rather than a hosting provider.

One thing that trips people on the first port: if the check fails immediately, test the credentials outside MostLogin before you assume they’re wrong.

curl -x socks5h://USER:PASS@HOST:PORT https://ipinfo.io/json

If that returns a Singapore carrier IP and MostLogin still refuses, the problem is in the profile config, not the port.

one port per profile, and why we sell it that way

Every SMP port is one physical SIM in one modem, assigned to one customer. Nobody else is behind that IP. That is the whole product, and it is why we can’t sell you a hundred ports for the price of a residential pool.

The practical rule that follows: one port per profile that has its own identity. If three MostLogin profiles share a single port, those three accounts share an IP, and you have spent money on fingerprint isolation that a platform can undo with one join on IP address.

Where people reasonably share a port is for profiles that are not separate identities. Research profiles, SERP checks, public page reads with no login. Those can sit behind one port without much risk, because there is no account to link.

We support Singtel, M1, StarHub and Circles. If a profile set needs to sit on M1 rather than Singtel, tell us and we move the port to an M1 SIM, usually the same day. There is more on the carrier differences in Singapore carrier proxies.

rotation, and when not to use it

Every port has a rotate link. You call the URL, the modem drops its connection and comes back with a new carrier IP. There is no schedule attached to it, deliberately, because we don’t know your workflow well enough to pick one.

The mistake we see most is rotating inside a logged-in session. If you change IP halfway through an authenticated session, the platform sees the session move networks mid-flight, which is exactly what a stolen cookie looks like. Rotate before you log in, or between jobs. Not during.

Read-heavy work is the opposite case. Price checks, rank tracking, ad library reads, anything with no session to protect: rotate as often as you like, because IP diversity is the point and there is nothing to break. The tradeoff between the two is covered in sticky vs rotating sessions.

MostLogin’s API is the natural place to hang rotation off, since you are already driving profile start and stop from code. Call the rotate URL between task phases rather than on a timer.

what a Singapore carrier IP is genuinely for

I’ll be honest about the boundary here, because it saves everyone time.

If you need forty countries, we are the wrong provider. We sell Singapore. That is it, and no amount of interest in your project changes it.

Where the port earns its cost is anything where being read as Singaporean is the actual requirement. Local ad verification, where you need the creative a Singapore phone user gets rather than the one a datacenter in Frankfurt gets. Singapore social accounts that were created on a local number and should keep behaving like it. Lazada and Shopee work, where the platform’s baseline user is a phone on a local carrier. SG-localised SERP checks, which move noticeably between a real carrier IP and a datacenter IP tagged as Singapore.

There is a smaller category that will not work at all without a genuine SG carrier IP: services doing hard geolocation checks, where a non-SG ASN fails outright regardless of what your browser claims.

mistakes worth avoiding

Pointing a mobile IP at a desktop profile. Mobile carrier IPs are expected to carry mobile browsers. If the profile declares desktop Chrome on Windows and exits through a 4G SIM, that pairing is visible. Match them.
Leaving a timezone or locale override that disagrees with Singapore. A profile that geolocates to Singapore and reports Europe/Berlin has done the work of a mismatch for free.
Installing a VPN extension inside a profile. It will override the proxy route and you will not notice until something flags.
Buying a month to test. We sell a day for $4 and a week for $13 precisely so you can check the ASN and the target site before committing to $40. There is also a 24-hour trial.
Assuming bandwidth is the constraint. Most multi-account work is light. The 200GB tier covers a lot of profiles. Video and uploads are what eat it, so if that’s your workload, price the 500GB or 1TB tier instead.

what to expect from the connection

A typical 4G port runs around 6 Mbps down, 12 Mbps up, with about 34ms to Singapore endpoints. That is enough for browser automation and social work and nowhere near enough to be pleasant for video uploads at volume. We have 5G devices on request that reach around 344 Mbps down, and if throughput matters for your workload, ask for one rather than assuming the 4G number.

Carrier load moves these figures. Treat them as a shape, not a guarantee.

getting started

Start with one port and one profile, run your most sensitive workflow through it, and only then scale. That order catches configuration mistakes while they cost you one account instead of thirty.

MostLogin readers get 20% off a first payment with the code MOSTLOGIN20. Plans are on the plans page, and the 24-hour trial does not need a card.

If you want to look at the browser side, MostLogin is where the profiles live.