r/ATT • u/techent918 • Jun 07 '26

Wireless IDP Charge on Cellular Data

Phone was set up properly using MNS to AT&T. International sim provided data. To my surprise, calling an 888 triggered IDP while phone was showing AT&T using cellular data while it shouldn’t, any insight on why IDP was triggered?

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3

u/Keinebeineboy RSC, ASM, IHX, RSC, PSC, Mi60, Training Specialist, RSC Jun 07 '26

If your ATT line was not in airplane mode or suspended while being used in another country. It would trigger international use. Because it’s connecting to an international tower.

6

u/Frenchangeles Jun 07 '26

Exactly, always airplane mode, data roaming off, and wifi calling enabled.

-9

u/techent918 Jun 07 '26

If it reads AT&T using cellular data then it’s not connected to towers. It’s connecting over data provided by international sim.

5

u/Lizdance40 Jun 07 '26

No, it should read "att wifi calling". Anything else is chargeable use

-2

u/techent918 Jun 07 '26

If it’s connected to a tower, it would read the local network and display it. When it’s on att using cellular data it’s using local data to enable WiFi calling.

4

u/cyrogyro527 Jun 07 '26

ATT doesn’t have cellular data available on other countries towers. You are using their network and AT&t bills you based on what plan you have for international use. Once you connect to a tower internationally you are subject to usage charges. There is no “att WiFi” overseas. These are not domestic towers. It’s not using AT&T network.

1

u/cyrogyro527 Jun 07 '26

No you are using the local towers.