Shahid Khan

See the app on the App Store: Secret Codes: IMEI & Carrier A complete iPhone check is useful before buying used, after a drop, before a repair, or when several features feel unreliable. Test the battery and storage, then check connectivity, display, audio, cameras, sensors, and Face ID. A structured scan is more useful than testing random features. Start with device information Open Settings > General > About and record the model, iOS version, IMEI, and available storage. Keep private identifiers out of public listings. Check Battery Health and note whether the phone becomes unusually warm during normal use. Test connectivity Test Wi-Fi, Bluetooth, cellular data, a phone call, and a text message. Check whether the issue follows one location or one network. On Dual SIM devices, confirm the correct line is selected. If cellular service is missing, also check the SIM, eSIM, carrier lock, and carrier outage status. Test the physical hardware Swipe across the entire display and t...

See the app on the App Store: Secret Codes: IMEI & Carrier Call-forwarding codes can activate, cancel, or query services on some GSM networks, but they are not universal iPhone commands. Support depends on the carrier, plan, region, and account. Use a verified reference before dialing a code that changes how your calls are routed. Why forwarding causes confusion Call forwarding may be managed by iOS settings, the carrier, a voicemail system, or a network shortcut. A code that works on one carrier may fail on another or behave differently for busy, unanswered, or unreachable calls. Check the current setup first Open Settings > Apps > Phone where available and review Call Forwarding. Then contact the carrier if calls are going to an unexpected number. Do not assume that restarting the iPhone cancels a network-level forwarding rule. Use codes carefully Confirm the code is published for your carrier. Read whether it activates, cancels, or checks a service. Make sure the destinat...

See the app on the App Store: Secret Codes: IMEI & Carrier When an iPhone says No Service, the cause may be a local outage, weak coverage, SIM problem, account issue, network setting, or hardware fault. Start with reversible checks and avoid changing call-forwarding or network codes until you know what they do. Start with the signal Move outdoors or near a window, then ask whether another phone on the same carrier is affected. Turn Airplane Mode on for about 15 seconds and turn it off. Restart the iPhone and test a call, text, and mobile-data connection. Check the active line Open Settings > Cellular and confirm that the intended line is enabled. On Dual SIM iPhones, verify the default voice and data lines. For a physical SIM, power off the phone and check that the card is seated correctly. For an eSIM, do not delete the profile unless the carrier instructs you to. Check for carrier updates Open Settings > General > About and wait briefly for a carrier settings prompt. I...

See the app on the App Store: Secret Codes: IMEI & Carrier An eSIM activation can fail because of an account issue, an unsupported model, weak internet, a carrier outage, or an old profile that is still active. Use these checks in order before deleting anything from your iPhone. Confirm the line is present Open Settings > Cellular . If the line appears, make sure it is turned on and selected for cellular data. If you use Dual SIM, check which line is being used for calls, messages, and data. Check the EID and IMEI Go to Settings > General > About and locate the EID and IMEI2. Your carrier may need one of these identifiers to activate the line. Never share them publicly. Send them only through the carrier's official support flow. Refresh the connection safely Connect to reliable Wi-Fi. Turn Airplane Mode on briefly, then off. Restart the iPhone. Check for a carrier settings update in the About screen. Ask the carrier whether the eSIM QR code or activation link is still...

See the app on the App Store: Secret Codes: IMEI & Carrier A carrier-locked iPhone may work only with the network that originally sold it. This matters when buying a used phone, changing carriers, activating an eSIM, or traveling internationally. Here is the safest way to check the status and what to do when the result is unclear. Check the iPhone settings Open Settings > General > About and find Carrier Lock . If it says “No SIM restrictions,” the phone is generally unlocked. If it shows a restriction or does not show the expected information, contact the carrier that sold the device. Carrier lock is not Activation Lock Carrier Lock controls which mobile networks can accept the device. Activation Lock is connected to the previous owner's Apple Account. A phone can be unlocked by a carrier and still be unusable because Activation Lock has not been removed. The seller must erase the phone and remove their account before you pay. Check compatibility before switching An unl...

See the app on the App Store: Secret Codes: IMEI & Carrier Buying a used iPhone can be a great way to save money, but a quick inspection is essential. Before you pay, check the IMEI, carrier lock, Activation Lock, battery, display, cameras, speakers, and cellular connection. This checklist helps you identify problems while you are still with the seller. 1. Check the IMEI and model Open Settings > General > About and compare the IMEI with the seller's documentation or original box. You can also dial *#06# in the Phone app to display supported device identifiers. Do not post an IMEI publicly; share it only with a carrier or trusted seller when necessary. 2. Confirm Carrier Lock In the About screen, look for Carrier Lock . “No SIM restrictions” generally means the iPhone is unlocked. If the phone is locked, ask the original carrier whether it can be unlocked before you buy it. An unlocked device is especially important if you plan to travel or switch to an MVNO. 3. Check A...

“No Service,” dropped calls, slow mobile data, and failed eSIM activation can have several causes. The problem may be a temporary carrier outage, a weak signal, an incorrect network setting, a damaged SIM, or an account issue. This practical iPhone troubleshooting guide starts with low-risk checks and then moves to carrier tools and device diagnostics. Start with the safest checks Look at the status bar and move outside or near a window if the signal is weak. Turn Airplane Mode on for about 15 seconds, then turn it off. Restart the iPhone and check whether the problem affects calls, mobile data, or both. If other people on the same carrier have the same issue, check the carrier's service-status page before changing device settings. Check your SIM and eSIM For a physical SIM, power off the iPhone, remove the tray, and check that the SIM is seated correctly and free of visible damage. For an eSIM, open Settings > Cellular and confirm that the li...

Your iPhone has several identification numbers and network settings that are useful when you are buying a used phone, moving to a new carrier, setting up an eSIM, or troubleshooting cellular service. The most important ones are the IMEI, ICCID, and EID. Knowing where to find them can save time and help you give accurate information to your carrier. What is an iPhone IMEI? IMEI stands for International Mobile Equipment Identity. It is a unique identifier assigned to a cellular device. Carriers may use it to identify your iPhone, check network compatibility, process a device change, or investigate whether a phone is reported lost or stolen. An IMEI is not the same as your phone number, Apple Account, or SIM number. How to find the IMEI on an iPhone The quickest method is to open the Phone app and dial *#06# . iOS displays the device identifiers supported by the phone. You can also open Settings > General > About and scroll to IMEI, IMEI2, EID, an...