How I Dodged Phantom Roaming Charges—And You Can Too!

The tales of unexpectedly high mobile bills while roaming abroad are widespread. Recently, a Reddit user shared their shocking experience of receiving a $53,000 bill from AT&T after an eight-day trip to Europe, which they had anticipated would only cost around $100 in roaming charges. It’s easy to sympathize with such individuals while realizing they’ve learned a hard lesson. In my case, my own roaming charges were far more manageable at about $20. However, I was still frustrated since I believed I had taken all the necessary precautions to avoid mobile data usage.

You might think I was to blame for incurring charges, but that wasn’t the case. I was careful not to overlook anything as soon as I landed, and I definitely wasn’t using a travel eSIM that needed time to activate. I don’t even have my home SIM in my primary phone; it’s in a different device on my desk. With mobile data and roaming both switched off, and my phone consistently connected to Wi-Fi, there’s hardly any chance I was using any data. Strangely, despite all these precautions, I faced phantom roaming charges twice within three months.

What led to these unexpected roaming charges, and more importantly, how can you prevent yourself from facing the same issue?

The first unexpected charge appeared on my bill a couple of months back. My provider recorded a small amount of roaming data usage — under 200KB — which triggered the full roaming fee for the day. I checked my device, thinking I must have accidentally enabled something, but mobile data and roaming were indeed turned off.

I dismissed my frustration at first, but two months later, it happened again—another tiny amount of data usage and another full charge. Both times, these incidents occurred at the end of the month. It was no longer just about the money; it was becoming a recurring issue that I wanted to resolve.

I reached out to my carrier for clarification. They verified both occurrences and indicated that my phone had connected to mobile data for only a split second. It seems that this brief connection was enough to trigger a full roaming charge. I couldn’t understand how this was happening, given that my phone was typically idle and connected to Wi-Fi. Even if I had accidentally turned on mobile data for a moment, roaming was still disabled in the settings. Oddly, my device displayed zero data usage, not even a fraction.

The carrier bore the brunt of my dissatisfaction—first through customer service, and then escalating my concerns to a supervisor. While I was eventually given a small compensation, they didn’t reverse the charges and seemed to imply that I was at fault, even though I didn’t feel that way.

What caused these instantaneous connections remains unclear. One theory suggests that they might be related to signaling or network registration traffic from the roaming partner. Carrier policies may also classify certain services, like MMS, as roaming data. Some manufacturers even advise that such issues can arise even with roaming disabled. The interplay between the home carrier, local network, and Android might be a contributing factor.

My experience isn’t unique; others have reported similar issues. For example, one user mentioned that their Galaxy S24 Ultra recorded 0.01MB of roaming data on several days thus incurring charges, even with data turned off. Another case involved a Pixel 9 where minimal data was charged randomly during a trip under the same conditions.

While it would be ideal to understand the cause, the more pressing question is how to prevent it from occurring again.

To avoid unexpected roaming charges, consider a few straightforward options: put your phone in airplane mode, deactivate the SIM, or simply turn off the device. However, these methods may not be ideal if you want to maintain your phone’s functionality for important calls or texts while preventing data use. Moreover, setting a zero spending limit with your carrier can serve as a useful safety cushion against unexpected fees.

For a more effective solution, inquire if your carrier allows you to block data roaming at the account level. This differs from simply disabling roaming on your phone, as it prevents any data roaming from being authorized on your line altogether.

That’s precisely what I opted to do. My service provider allows me to impose a data roaming restriction on my account, while still permitting calls and texts abroad. This way, my device can connect to Wi-Fi to receive important messages without the risk of incurring roaming fees. Should a charge arise, the burden would be on the carrier.

It’s worthwhile to check how your specific provider manages this, as policies and available options may differ. Major carriers usually have provisions for this within their apps. If you intend to travel abroad and want to eliminate any chances of mobile data leading to roaming fees, don’t solely rely on your phone settings; a provider-level data roaming block provides added security.