This is the question that stops people starting a trial at all: what happens on day 31? The honest answer depends on which of two very different things you signed up for. A true eSIM trial has no payment method attached, so it simply stops. A money-back guarantee is a real paid account with your card on file, refundable only if you cancel in time. Same phrase, opposite risk.
The two mechanics
- True eSIM trials — Verizon, T-Mobile, AT&T, Visible, Boost, Cricket, Google Fi, US Mobile, Red Pocket, AirVoice, Appalachian. No card, no charge, no cancellation. The line expires on its own.
- Money-back guarantees — Consumer Cellular, Xfinity Mobile, and Spectrum Mobile on standard purchases. You are a paying customer from day one and must formally cancel and return equipment inside the window to get your money back.
What happens to your trial number
On an eSIM trial you were issued a temporary number, and it goes away with the line. Nothing about your real number is affected, because your original line stayed active the whole time. Anything tied to that temporary number — two-factor codes, a delivery service you gave it to — stops working, so don’t use a trial number for anything you need to keep.
US Mobile is the exception worth flagging: its trial requires porting your real number in. That means the end of that trial is a genuine decision point rather than an expiry, and walking away requires porting back to your old carrier.
The conversion prompt, and why it’s timed the way it is
Every carrier prompts you to convert as the trial closes, and the offer usually carries a discount that expires quickly. That urgency is deliberate — it’s designed to make the decision for you while the trial experience is still fresh. If you need more time, let the trial lapse. You can sign up later at the standard rate, and the standard rate is what you’ll be paying for years anyway.
If you want to convert
- Decide before the last two days, so you’re not choosing under a countdown.
- Sign up for a regular paid plan through the carrier’s app or site.
- Port your number from your old carrier — you’ll need your account number and transfer PIN from that carrier, not from the new one.
- Wait for the port to fully complete before cancelling anything. This is the step people get wrong, and cancelling early is how numbers get lost.
- Only then close the old account.
If you want to walk away
- eSIM trial: do nothing. Optionally delete the expired eSIM profile from your phone’s settings to keep things tidy.
- Money-back carrier: cancel formally, return the equipment, and keep the confirmation until the refund lands.
- Either way, note what failed. “Verizon dropped calls in my kitchen” is useful information for the next trial; “it felt fine” is not.
Can you run the same trial again later?
Usually not soon. Most carriers restrict trials to new customers, and several enforce a waiting period — T-Mobile’s runs once per six months, and Boost excludes anyone who has been a Boost or T-Mobile customer within 180 days. Treat each trial as a single shot and plan the month before you activate it.
Fifteen carriers compared by length, data, eligibility, and whether a card is required.
Every free cell phone trial, compared →
Jean Gilles has researched personal finance, consumer technology, and wireless pricing for over a decade. He founded ShopCellPlans in 2019 and writes every review on the site.
Frequently asked questions
Will I be charged when my free trial ends? +
Do I need to cancel a free trial? +
What happens to the temporary trial number? +
How long before the end should I decide? +
Can I start the same trial again later? +
What if I ported my number in for the trial? +
One email when a carrier raises rates, drops a plan, or launches a deal worth switching for. No spam, unsubscribe anytime.