Sophie
16 de octubre de 2026 · 11 min de lectura
You're texting your daughter on an internship in Lisbon or a contact on Movistar, you made sure to switch on delivery reports in your Messages app, and… nothing. Or worse: a "Delivered" that appears while the other person swears they never received a thing. This isn't a bug. An SMS delivery report is not proof of reading, and often not even proof of delivery: it's an optional technical message, issued by a link in the chain that is almost never the recipient's handset.
Updated 16 October 2026.
What is an SMS delivery report actually for?
An SMS delivery report (delivery report, or DLR) is a small service message sent back to your phone to indicate that a text has cleared one stage of the network. In the best case, it means the message was delivered to the recipient's handset. In many international cases, it only means it was accepted by an intermediary. It never tells you the message has been read.
Technically, your text doesn't travel from phone to phone. It goes through an SMSC (Short Message Service Centre), your operator's messaging centre, which stores it and then pushes it onto the recipient's network. In between, for an international send, one or more wholesale carriers are almost always involved — companies specialising in routing SMS traffic between operators, Belgium's BICS being a well-known example in the industry.
At every handover, the "it arrived" information has to travel back up the chain in the opposite direction. And that's exactly where things break.
Why does the delivery report disappear when I text abroad?
Because sending the delivery report back up the chain is optional and depends on every network the message crosses. Within France, between two Orange, SFR, Bouygues Telecom or Free Mobile subscribers, the information flows fine. As soon as the message leaves the country, each intermediary can choose not to return the report, or to return a "courtesy" report.
Three typical behaviours show up:
| What you see | What it really means |
|---|---|
| No report at all, ever | The destination network or an intermediary doesn't generate delivery reports. Your message may well have arrived perfectly. |
| "Delivered" almost instantly | The report was probably issued by an intermediary when it received the message, not by the final handset. Low reliability. |
| "Delivered" after several hours | The recipient's phone was switched off or out of coverage: the SMSC retried and eventually delivered. This is the most reliable case. |
In other words, a report that takes its time is often more credible than an instant one. And the absence of a report isn't a failure: it's an absence of information.
The trap of a "Delivered" that isn't
Some international carriers engage in what the industry calls a fake DLR: they return a positive report as soon as they accept the message, for traffic-management reasons, even if the next stage fails. You see "Delivered", the recipient sees nothing. No setting on your phone fixes this — it's beyond your control and beyond your French operator's control too.
That's one more reason never to use an SMS delivery report as proof in a sensitive context (passing on a code, confirming a medical appointment, payment details). For those uses, a confirmation message sent back by the person remains the only valid verification.
How do I turn delivery reports on (or off) on my phone?
The setting exists on Android and, in a different form, on iPhone. Be aware: enabling it can carry a cost in some cases, and some operators bill the report as a text message.
On Android, Google Messages app (2026 version):
- Open Google Messages.
- Tap your profile picture → Messages settings.
- Go into Advanced settings.
- Turn on Get SMS delivery reports.
On Samsung (One UI), if you still use a third-party app: the path is Settings → SMS settings → Delivery reports. A useful reminder: Samsung Messages was discontinued in July 2026 and migrating to Google Messages is now the norm — we walked through the process in our article on the end of Samsung Messages.
On iPhone: there is no delivery report for standard SMS. The Settings → Apps → Messages → Read Receipts option applies only to iMessage (the blue bubbles), between two Apple devices. Texting a foreign number on Android puts you in green-bubble SMS: no indicator will show at all.
Why my "Delivered" sometimes comes back twice
If you send a long text (beyond 160 characters, or 70 with emoji and certain accented letters — we explain this in our article on the 160-character limit), the message is split into several concatenated SMS. Each segment generates its own report. Three reports for a single message sent is therefore not an anomaly.
SMS, RCS, WhatsApp: these indicators don't measure the same thing
This is the most widespread confusion. The ticks you know from internet messaging apps have absolutely nothing to do with SMS delivery reports.
| Service | Indicator | What it proves | Reliable internationally? |
|---|---|---|---|
| SMS | "Delivered" / "Sent" | Clearing a network stage, at best delivery to the handset | Variable, often missing |
| RCS (Google Messages, Apple Messages) | "Delivered", then "Read" | Delivery to the device, then the conversation actually being opened | Yes, if both sides have RCS active and data |
| iMessage | "Delivered", then "Read" | Same, between Apple devices only | Yes, with data or Wi-Fi |
| WhatsApp, Signal, Telegram | One tick, two ticks, two coloured ticks | Server, device, read | Yes, with data or Wi-Fi |
RCS has changed the picture: unlike SMS, it was designed with genuine delivery and read states, because it travels over the internet rather than the signalling channel. But it requires a data connection on both sides, and it isn't universal — that's the whole issue described in our comparison of RCS versus SMS.
The practical consequence when travelling: if you switch off mobile data outside the European Union (a sensible reflex), your messages fall back to SMS and you lose the "Read" indicator. The text still goes out, but you no longer have any visibility. It's the same mechanism that explains why an MMS won't download abroad.
"Message not delivered": what to do in practice
Before blaming the delivery report, check that the message actually went out. A silent failure almost always has one of these causes, in order of frequency:
- The number format. An international number is written with the country code and without the leading 0 of the national number:
+351 9XX…for Portugal,+34for Spain (Movistar, Vodafone),+52 1for a Mexican mobile (Telcel),+212for Morocco. Save the contact in international format: it will stay valid wherever you are. - "International SMS" not enabled on your line. Common on prepaid offers and entry-level plans. We covered it in detail in receiving texts but unable to send them abroad.
- A wrong message centre (SMSC) in the phone's settings after some tinkering or a SIM swap: no text goes out at all any more, including within France.
- An anti-fraud cap reached after several messages sent in quick succession to the same country.
- Filtering on the destination network, against which neither you nor your operator can do anything.
For cases 1 and 2, the diagnostic test is simple: send the same text to a French number. If it goes out, the problem is international. If it doesn't, it's your line or your phone.
An often-forgotten detail: the validity period
The SMSC keeps an undelivered message for a limited validity period, then abandons it for good. This duration can be set on some Android phones (SMS settings → Validity period) and typically ranges from a few hours to a few days depending on the operator. If the recipient is travelling in an area without coverage for a week, your message may expire before it arrives — with no notification for you at all. In poorly served regions, a small portable solar charger at least rules out the recipient's battery as the cause of the silence.
What the rules say about proving a text message
No French legislation gives an SMS delivery report the status of proof of notification. For communications with legal weight, French law relies on the electronic registered letter governed by the European eIDAS regulation and Article L. 100 of the French postal and electronic communications code (available on Légifrance), not on a text message.
On the network side, Arcep publishes quality-of-service indicators on sending and receiving SMS in France, but there is no obligation requiring foreign operators to return a reliable delivery report to a French operator. It's a commercial practice, not a binding standard.
Also worth noting: Arcep has documented the massive decline of standard SMS while roaming — -38.5% in the first quarter of 2026 for that use alone, a figure we analysed in SMS roaming: Arcep confirms the end of a habit. Less international SMS traffic also means less incentive for intermediaries to take care over returning reports.
Three habits for texting abroad without relying on an indicator
1. Double up the channel for messages that matter. A text to warn of a flight delay, plus an RCS or WhatsApp message. If either channel gets through, the information lands.
2. Ask for an explicit reply. "Just send me one word to confirm" remains the only read receipt that never lies. That's just as true for a message sent from our online SMS sending service as from your own phone.
3. Prepare the ground before you leave. Before a long trip, check that RCS is enabled, save numbers in international format and keep a backup power solution: a compact power bank in your carry-on and, depending on the destination, a universal travel adaptor will make far more difference than a delivery-report setting. For stays in the mountains or by the sea, a waterproof bike mount for your smartphone prevents the kind of damage that really does cut off communication.
And if you check your messages from a shared computer while travelling, a privacy screen filter limits over-the-shoulder reading — a far more concrete risk than a missing delivery report.
Frequently asked questions
Do SMS delivery reports cost anything?
With most French operators, delivery reports are free on current plans. Some older or prepaid offers count them as an outgoing text. Check your plan's price list before enabling the option if you text abroad a lot.
Why does my text say "Delivered" when my contact received nothing?
Because the report was probably issued by a routing intermediary, not by the recipient's handset. This happens often on certain international routes. Try another channel (RCS, an internet messaging app) to confirm.
How can I tell whether a text has been read?
Not with a standard SMS: the protocol carries no read information whatsoever. Only RCS, iMessage and internet messaging apps show a genuine "Read" status, and only if the recipient hasn't turned it off.
Should I leave delivery reports on all the time?
It's useful if you often text unreliable networks: a late report tells you that a stuck message finally got through. For everyday use within France, the information adds almost nothing and clutters the conversation.
My phone no longer has the delivery report option — why?
The setting has been moved into Advanced settings in Google Messages, and it disappears when the conversation switches to RCS, since RCS manages its own statuses. On iPhone, the option has never existed for SMS.
To go further on the costs and formats for sending to a foreign number, see our FAQ and the pricing page.
