Secret Codes guide
#766# on iPhone: Turn On T-Mobile International Data Roaming
By Muhammad Shahid · · 4 min read
Quick answer
#766#: #RON# — enable international data roaming on the account. 766 spells RON, for roaming on. This is an account-side switch at T-Mobile, separate from the Data Roaming toggle in iOS. Both have to be on before data works abroad. T-Mobile points customers at this code when data will not connect in a destination outside the included Simple Global list.
Secret CodesDial codes, SIM & network test · Free on the App StoreDownload free →| Code | #766# |
|---|---|
| What it does | #RON# — enable international data roaming on the account. |
| Published for | T-Mobile |
| Type | Carrier specific |
#RON# — enable international data roaming on the account. This page explains what #766# does, how to use it on an iPhone and which carriers it applies to.
I build Secret Codes: IMEI & Carrier, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, get Secret Codes on the App Store.
What does #766# do?
766 spells RON, for roaming on. This is an account-side switch at T-Mobile, separate from the Data Roaming toggle in iOS. Both have to be on before data works abroad.
T-Mobile points customers at this code when data will not connect in a destination outside the included Simple Global list. It is the first thing to try before calling support from overseas.
Dial it before you fly if you can. Once abroad with no data, a dialled code still goes through even when nothing else does.
Important: In destinations not covered by your plan, enabling data roaming can mean pay-per-megabyte charges. Check the rate for your destination first.
How do I use #766#?
- Open the Phone app and tap Keypad.
- Type #766# exactly as written.
- Press the green Call button and wait for the result.
Which carriers does this apply to?
| Published for | T-Mobile |
|---|---|
| Type | Carrier specific |
| Good to know | T-Mobile lines. This is the carrier-side permission; the iOS Data Roaming switch is separate and also has to be on. |
Related more carrier and n11 codes
- #796#: Turn T-Mobile Voicemail Password On or Off
- #763#: Turn Off T-Mobile International Data Roaming
- #793#: Reset T-Mobile Voicemail Password
- #2535#: T-Mobile Bill Ready Notification
- #674#: Check T-Mobile Message Usage
- #999#: T-Mobile Prepaid Account Balance
See all more carrier and n11 codes or every category of iPhone codes.
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Frequently asked questions
What does #766# do on iPhone?
#RON# — enable international data roaming on the account. 766 spells RON, for roaming on. This is an account-side switch at T-Mobile, separate from the Data Roaming toggle in iOS. Both have to be on before data works abroad.
What else should I know about #766#?
T-Mobile points customers at this code when data will not connect in a destination outside the included Simple Global list. It is the first thing to try before calling support from overseas. Dial it before you fly if you can. Once abroad with no data, a dialled code still goes through even when nothing else does.
What are the steps for #766#?
1. Open the Phone app and tap Keypad. 2. Type #766# exactly as written. 3. Press the green Call button and wait for the result.
Where do I use #766#?
On the keypad of the Phone app.
Do I need to press Call after typing #766#?
Yes. Type it on the Phone keypad, then press the green Call button.
Is #766# a hidden or secret code?
No. It is a published service, not a hidden menu. iPhones do not have Android-style engineering menus.
Which carriers does #766# work on?
It is published for T-Mobile. T-Mobile lines. This is the carrier-side permission; the iOS Data Roaming switch is separate and also has to be on.
Is there anything to watch out for with #766#?
In destinations not covered by your plan, enabling data roaming can mean pay-per-megabyte charges. Check the rate for your destination first.
Does #766# work on Android phones too?
It is handled by the carrier or service rather than the iPhone, so it is not tied to one phone brand. Check with your carrier.
Will #766# work outside the US?
It is published for US carriers and services, so do not count on it abroad. Ask your carrier before you travel.
What if #766# does not work on my iPhone?
Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.
What is related to #766#?
#796#: Turn T-Mobile Voicemail Password On or Off. #PWO# — require a password, or skip it from your own phone.
Sources
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