Undetectable.io on a $4 4G Day Pass Proxy

Undetectable.io is the antidetect browser we recommend first, and it pairs well with a day pass because a profile is cheap to spin up and cheap to tear down. This guide covers the setup in plain steps: buy a line, put it in a profile, match the profile's locale to the line's city, check the result, and handle the moment the 24 hours run out. Nothing fancy, just the parts that matter.

Why one line per profile

An antidetect profile is meant to look like one person on one device. If two profiles share a proxy, they share an address and a network history, and any platform that links accounts by network will tie them together. On a $4 day pass there is no reason to share. Buy one line per profile you intend to run that day. The lines are dedicated SIMs, so each profile gets a carrier address of its own with nobody else's activity on it.

If you run profiles in different cities, buy lines in those cities. We have eight: New York, Los Angeles, Chicago, Houston, Phoenix, Miami, North Carolina and Boston. A profile claiming to be in Miami should leave through a Miami line.

Putting the line into Undetectable.io

Open the dashboard at me.4gproxiesusa.com and copy the host, port, username and password from the line's row. In Undetectable.io, create a new profile, open its proxy section, choose HTTP or SOCKS5 to match the port you copied, and paste the four values in. Use the built-in check button. It should report a US address from the carrier you chose. Save the profile.

You can also add the line under the shared proxy list in Undetectable.io and attach it to the profile from there, which is handy if you want to swap lines between profiles tomorrow. Either way, the profile should point at exactly one line.

Match time zone, language and geolocation to the city

This is the step people skip, and it is the one that undoes the value of a carrier address. The IP says Houston. If the browser's time zone says Europe and its language says Russian, the two stories disagree, and that disagreement is what detection systems notice. In the profile settings, set the time zone to the city's zone: Eastern for New York, Boston, Miami and North Carolina, Central for Chicago and Houston, Mountain for Phoenix, Pacific for Los Angeles. Set the language to en-US. If you use geolocation, set it near the city center.

Undetectable.io can fill these from the proxy automatically. Turn that on and verify the result rather than assuming it. The carrier address is the hardest thing to fake, so let it be the anchor and make everything else agree with it.

Rotating from inside the day

Each line has a rotation link. Most account work is better off not rotating at all, because a stable address looks like a stable person, and sticky addresses on our lines stay put as long as the carrier keeps the session. Rotate when you have a reason: a fresh start for a new profile on the same line, or a check that behaved oddly. Call the link, wait a few seconds, reload the IP check in the profile, carry on. The profile's cookies and fingerprint are untouched. Only the address changed.

When the day ends

The pass expires 24 hours after activation and the line stops answering. The profile itself is unaffected. It just has a dead proxy attached. You have three choices. Extend the same line from the dashboard before it expires, and the profile keeps the same carrier, city and address history, with the remaining time carried over if you step up to a week at $25 or a month at $60. Buy a fresh day pass in the same city and update the profile's proxy fields, in which case the address will be different but from the same carrier pool. Or let the profile rest until next time.

For accounts you care about, extending beats replacing. A profile that logs in from the same line for weeks builds a history that a daily new line does not. The day pass is the cheap way to find out which profiles are worth that.

A short checklist

Before you log into anything: one line per profile, protocol matches the port, the check button shows a US carrier address, time zone and language match the city, and you know the expiry time. That is the whole setup, and it takes a few minutes per profile.

Frequently asked