Switching Carriers: Number Portability and Your Rights

This page is a translation of the original Portuguese text, provided for convenience. It deals with Brazilian law. If there is any discrepancy, the Portuguese version prevails. Read the original in Portuguese

Switching your phone or internet carrier while keeping the same number is a right guaranteed by law, but many consumers don’t know the deadlines, loyalty-period rules and limits on charges that apply when they move.

Number portability as a consumer right

Number portability lets you change landline or mobile carriers without giving up the number you already use. It applies to both prepaid and postpaid lines, and it also covers many internet plans bundled with phone service. The logic behind the rule is straightforward: the number belongs to the consumer, not to the company that provides the signal. For that reason, moving from one carrier to another is not a favor the company grants. It is an obligation of a regulated industry.

This right rests on the Consumer Protection Code and on the telecommunications rules issued by the industry’s regulatory agency. Together, these rules protect you from contractual traps that make leaving difficult and from practices that push customers to stay against their will. When a carrier creates artificial obstacles, charges amounts not clearly provided for in the contract, or delays the transfer beyond the required deadline, you have solid grounds to complain through administrative channels and, if necessary, to go to court.

It helps to separate two concepts that are often confused. Switching carriers with portability keeps your old number. Simply signing up for a new line, on the other hand, gives you a new number and does not involve the transfer process. If you want to keep the number that family, clients and registered services already know, you must expressly request portability when you sign the plan with the new company.

How the switching process works

The process starts with the receiving carrier, the one you chose to take over your line. It opens the portability request and coordinates the transfer with your current carrier. You do not need to notify the old company or ask its permission to leave. You simply sign up for the new plan and ask for your number to be transferred. The original carrier may refuse the transfer only in specific situations, such as mismatched registration data or a request made by someone who is not the line’s account holder.

The deadline to complete portability is short and runs from the date of the request. During the transition, your service stays active, and you are told when the line will begin working on the new carrier. There is usually a brief window of unavailability, typically a few hours, while the number leaves one network and enters the other. Outside that technical window, the line should keep working normally, without prolonged outages that interfere with its use.

To avoid problems, our team recommends a few simple precautions before you start the switch. Checking that your registration data is correct with both carriers reduces the risk of a refusal. Keeping service protocol numbers and proof of your request creates evidence in case of a delay or an improper charge. Checking the new company’s coverage in the area where you use the number most also spares you regret after the switch.

For prepaid lines, a recurring question concerns the remaining credit balance. The switch does not automatically refund unused amounts held with the old carrier, so you should check how much credit is left before requesting the change. For postpaid plans, pay attention to the billing cycle so you are not charged twice for monthly fees in the month the line moves from one company to the other. Planning the date of your request helps reduce this kind of overlap.

Portability is a consumer right, and no carrier can block customers who want to change companies while keeping the same phone number.

Portability is a consumer right, and no carrier can block customers who want to change companies while keeping the same phone number.

This principle guides how every contract clause should be read. If any part of the contract tries to make leaving conditional on paying disproportionate amounts, or imposes steps that do not exist in the industry’s rules, there is room to challenge the requirement. An adhesion contract (a standard-form contract drafted by the company) cannot turn a legal right into a commercial obstacle.

Loyalty periods, penalties and unpaid balances: what can be charged

The most common question for anyone thinking about switching carriers involves the loyalty commitment. Many plans offer discounts or subsidized devices in exchange for a minimum period of service. If you leave before that period ends, the carrier may charge a penalty proportional to the time remaining on the contract. The word proportional is decisive: the penalty must shrink as you move through the agreed period, rather than staying at its full amount until the last day.

Charges that ignore this proportionality tend to be abusive. The same reasoning applies to penalties of an unknown amount that were not clearly stated when you signed up. You have the right to prior, prominent information about any penalty, and a lack of clarity weakens the charge. If you are facing this kind of demand, you can better understand the limits of the penalty by reading our content on loyalty penalties and when they are considered abusive.

Outstanding balances are another source of conflict. The original carrier may continue to bill for services actually provided before the switch, because portability does not erase legitimate debts. What it cannot do is hold your number hostage to pressure you into paying. Holding the line until you pay a disputed bill is a prohibited practice, since switching carriers does not depend on the absence of prior debts.

The difference between the loyalty penalty and the charge for the device also deserves attention. When the phone was purchased on special terms tied to the plan, the contract may provide for repayment of the subsidy if you leave early. This charge must be set out transparently and separately from the penalty for leaving early, so you know exactly what you are paying and why.

Common problems and how consumers can respond

The switch does not always go smoothly. One frequent problem is a disguised refusal, when the original carrier raises requirements that are not in the rules in an attempt to keep you as a customer. Another is a delay beyond the deadline that leaves you without a line for days. There are also unexpected charges after you leave, including monthly fees for a service that has already been canceled. In all of these situations, a detailed record of what happened is the foundation of any complaint.

The first step is the carrier’s own customer service channel, noting the protocol number. If the problem continues, you can turn to the telecommunications regulatory agency, which receives complaints and demands answers from the companies. Consumer protection bodies, such as municipal and state consumer protection offices, also mediate disputes and can impose administrative sanctions when they find improper conduct.

When the administrative route does not solve the problem, or when you suffer significant harm, the solution may go through the courts. You can seek correction of the line, a refund of amounts improperly charged and, where there is concrete harm, compensation. Having your name placed on a credit blacklist over a disputed debt, a prolonged service interruption and repeated neglect in customer service are examples of situations that commonly support claims for redress, always assessed in light of the evidence presented.

Our advice is preventive: document every step and do not accept information given only by phone without a record. Keeping contracts, bills, e-mails and protocol numbers turns your word into organized evidence. This care tends to shorten the path to a solution, because it undermines the claim that you never requested portability or that the charge was correct. When large amounts are involved or the refusal persists, having a professional review your contract individually helps define the best strategy.

Frequently Asked Questions

Do I need to notify my old carrier to port my number?

No. You make the request with the receiving carrier, which coordinates the transfer with your current company. You do not have to tell the old carrier you are leaving or ask its permission to move. You simply sign up for the new plan and expressly ask for your number to be transferred, providing the correct information for the line’s account holder.

Can the carrier hold my number if I have an unpaid bill?

No. Owing a debt does not prevent portability. The original carrier may continue to bill for services actually provided before the switch, but it cannot hold your number to pressure you into paying. Withholding a line over a disputed debt is a prohibited practice and can be challenged through administrative channels and in court.

Is the penalty for leaving before the loyalty period ends always owed?

Not always in full. When there is a loyalty commitment with a real benefit, the penalty may be charged, but only in proportion to the time remaining in the agreed period. Penalties that ignore that proportion, or that were not clearly disclosed when you signed up, tend to be abusive, and you can contest them by requesting a review or a refund of the excess amount charged.

As informações deste artigo são de caráter informativo e não substituem consulta jurídica individualizada. Cada caso possui particularidades que exigem análise específica.