Apple Secret Codes & USSD Dial Codes (2026)
iPhone field-test & carrier codes
Apple takes a much stricter approach to hidden diagnostics than Android manufacturers, so iPhone secret codes are mostly standard GSM MMI strings rather than proprietary service menus. What survives is still genuinely useful: Field Test Mode exposes the raw cellular measurements iOS hides behind signal bars, and the call-forwarding, call-waiting and caller-ID interrogation codes report exactly how your carrier has configured the line.
Field Test Mode is the headline tool. It shows the serving cell, the frequency band in use and the RSRP value in dBm, which is the only honest way to compare reception between two locations or two SIM cards. Anything above roughly -90 dBm is strong; below -110 dBm you are on the edge of usable service.
The remaining iPhone codes are interrogation strings. They ask the network a question and print the answer, so none of them can damage the device or alter your data. There is no iPhone equivalent of the Android hardware test grid, and no dial code can jailbreak, unlock or bypass Activation Lock, whatever other sites claim.
Checking a used Apple handset? Run its IMEI through our free IMEI checker — dial *#06# to reveal the 15-digit number.
Full Apple secret code list (16 codes)
Every code below is documented from public device and service documentation. None of these codes erase user data, but always read the risk column first.
| Code | What it does | Category | Risk level |
|---|---|---|---|
| Voicemail Forwarding Status. Shows the number and delay used for forwarding unanswered calls to voicemail. | call | Safe — read only | |
| No-Service Forwarding. Shows the number calls are forwarded to when the iPhone is unreachable. | call | Safe — read only | |
| Call Barring Status. Shows whether call barring is active on the iPhone line. | network | Safe — read only | |
| Show IMEI. Displays the iPhone's IMEI number. | info | Safe — read only | |
| SMS Center Number. Shows the message centre number used to send SMS. | info | Safe — read only | |
| Forwarding When Busy. Shows where calls go when the line is busy. | network | Safe — read only | |
| Remaining Minutes. Checks remaining plan minutes (works on some US carriers only).Community-reported · unverified | network | Safe — read only | |
| Caller ID (incoming). Shows whether incoming caller ID is enabled. | network | Safe — read only | |
| Caller ID (outgoing). Shows whether your number is presented on outgoing calls. | network | Safe — read only | |
| Prepaid Account Balance. Checks prepaid balance (carrier-dependent).Community-reported · unverified | network | Safe — read only | |
| Field Test Mode. Dial then press call to open the Field Test app showing detailed cellular signal and cell data. | diagnostics | Safe — read only | |
| Call Forwarding Status. Shows all-call forwarding settings on the iPhone. | network | Safe — read only | |
| Cancel All Forwarding. Turns off every type of call forwarding on the line. | network | Caution — changes settings | |
| Call Waiting Status. Shows whether call waiting is currently enabled. | network | Safe — read only | |
| Enable Call Waiting. Turns on call waiting so a second caller can reach you mid-call. | network | Caution — changes settings | |
| Disable Call Waiting. Turns off call waiting. | network | Caution — changes settings |
How to use Apple codes
- Open the iPhone Phone app and go to the keypad, exactly as if you were dialling a number.
- Type the code precisely as shown, including the leading
*and the trailing#. Autocorrect and paste can drop characters, so type it out. - Most sequences fire the moment the final character is entered — you usually do not press call.
- If the screen does not change, press the call button once; a few USSD strings need it.
- Back up photos, messages and app data before running anything marked destructive, then confirm you are on the right device.
- Nothing at all happening usually means the code is disabled on your firmware or blocked by your carrier — it is not a fault with your handset.
Apple secret codes — FAQ
Ondersteun alle Apple-fone dieselfde geheime kodes?
Nee. Kodeondersteuning hang af van die model, die fermwareweergawe en in baie gevalle die netwerkverskaffer wat die selfoon verskaf het. Ouer Apple-modelle bied dikwels toegang tot meer diensspyskaarte as die nuutste modelle, omdat vervaardigers tegniese hulpmiddels geleidelik tot ondertekende diagnostiese toepassings beperk. As ’n kode niks doen nie, is dit byna seker uit jou sagtewareweergawe verwyder of daarin gedeaktiveer, eerder as dat dit verkeerd ingetik is.
Is dit veilig om Apple se geheime kodes te skakel?
Die kodes wat ons as "veilig" merk, wys slegs inligting of maak ’n leesalleen-toetsspyskaart oop, dus kan hulle nie jou foon beskadig nie. Kodes gemerk "wees versigtig" verander ’n instelling of begin ’n hardewareprosedure wat jy eers moet verstaan, en kodes gemerk "vernietigend" wis gebruikersdata onmiddellik uit sonder enige bevestigingsdialoog. Maak altyd ’n rugsteun voordat jy enigiets in die vernietigende kategorie uitvoer.
Waarom gebeur niks wanneer ek ’n kode invoer nie?
Drie algemene redes: die kode word nie deur jou fermware ondersteun nie, jou netwerkoperateur het die USSD-string geblokkeer, of die skakeltoepassing vereis dat jy die oproepknoppie vir daardie spesifieke reeks druk. Probeer die kode met ’n ander SIM of in vliegtuigmodus, en kontroleer elke karakter, insluitend die sterretjie aan die begin en die hutsmerk aan die einde.
Sal die gebruik van hierdie kodes my Apple-waarborg ongeldig maak?
Om bloot diagnostiese inligting te lees, maak nie 'n waarborg ongeldig nie. As jy egter radiofrekwensiebandinstellings verander, skryfbewerkings in 'n ingenieurskieslys uitvoer of 'n fabrieksformatering doen, kan dit jou toestel in 'n toestand laat wat 'n dienssentrum as gebruikerskade kan beskou. Hou by leesalleen-kodes, tensy jy amptelike herstelinstruksies volg.
Kan hierdie kodes 'n netwerkgeslote Apple-foon ontsluit?
Nee. Netwerkontsluiting vereis 'n ontsluitkode wat deur die netwerkoperateur uitgereik is, of 'n amptelike ontsluitversoek deur jou operateur. Enige webwerf wat 'n gratis universele skakelkode vir ontsluiting belowe, mislei jou. Die kodes wat hier gelys word, bied slegs toegang tot diagnostiek, netwerkstatus, fermware-inligting en prosedures om fabrieksinstellings te herstel.
Hoe vind ek my IMEI op 'n Apple-toestel?
Skakel *#06# op enige GSM- of LTE-foon, insluitend elke Apple-model, en die IMEI verskyn onmiddellik. Jy kan ook die nommer met ons IMEI-kontroleerder valideer. Dit voer die Luhn-kontrolesomtoets uit wat die GSMA gebruik om verkeerd getikte of versinde IMEI-nommers op te spoor.
Gidse vir Apple-probleemoplossing
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