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| + | Mention iPhone 7 in intro https://support.apple.com/iphone-7-no-service |
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| + | |
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| + | == First Steps == |
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| + | Before undertaking any of the more involved solutions below, here are a few quick fixes to get you started. |
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| + | * Restart your phone. This can clear any minor software hiccups. |
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| + | * Update your OS. You can check for new versions under ''Settings > General >Software Update.'' |
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| + | * Check for a carrier settings update. Occassionally your cell phone provider will push updates to the way your phone can connect to its network. To prompt a cellular update, be sure you're on WiFi and navigate to to ''Settings > General > About.'' If an update is available, it will initiate a pop up to install it. |
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| + | |
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| + | == SIM Card == |
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| + | |
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| + | Your SIM card is actually a small computer chip embedded into plastic so it can be transferred easily across devices.Although they are resilient, they can become faulty, or may not be compatible with the phone you’ve transferred it into. |
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| + | * Try a simple reseat of the card. [link|https://www.ifixit.com/Search?doctype=guide&query=iphone%20sim%20tray|Eject the SIM tray], make sure the card is properly oriented in the cutout. Reinsert the tray. Retest. |
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| + | * Try the SIM from a friend or family member with the same cellular carrier, if it works, your SIM may just need replacing. Request one from your service provider, or visit one of their physical locations so they can activate a new card for you. |
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| + | * As a workaround, make use of your phone’s eSIM instead, if this option is available in your region and model of phone. Starting with the iPhone XS, all iPhones are capable of handling two SIM cards—at least one physical card, and often a second which is embedded in the phone's hardware. This electronic SIM may work properly when the physical SIM will not. Verify that your [link|https://support.apple.com/en-us/HT209096|carrier supports eSIM] use and contact them to activate it. |
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| + | |
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| + | == Phone is Carrier Locked == |
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| + | Especially in the US, where the cost of a cell phone is often subsidized by your monthly plan, or paid off in installments, service providers implement locks to prevent you from utilizing your equipment with competitors until they have recouped the cost of the phone. |
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| + | [image|2764444] |
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| + | |
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| + | * This is more likely to present when inserting a SIM into a new device, and is accompanied by Invalid SIM warnings |
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| + | * When buying a used phone, check with your carrier ensure it is capable of activation on their network. You will need the IMEI for the device. This will validate compatibility and can help to avoid surprise issues. |
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| + | * If it is compatible, but currently locked, contact the original carrier for the phone to see if it is eligible for unlock. |
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| + | * Be cautious of online services which claim to unlock devices. These sorts of hacks ''may'' work, but can be affected by software update or restoring the OS. |
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| + | |
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| + | == Software Bug == |
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| + | |
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| + | Occasionally, incompatible or corrupted software can cause network issues with an iPhone. It is infrequent, but worth ruling out before embarking on deeper level hardware fixes. |
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| + | |
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| + | * Perform a Network Settings reset. Be aware this will clear all known WiFi and Bluetooth connections from the iPhone's memory and they will need to be reconnected. |
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| + | * Verify the operating system and apps are up to date. |
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| + | * To rule out altogether, reset the device. In cases of potentially faulty software, it is advisable to do this via a PC with iTunes or a Mac to be sure a fresh copy of the OS is installed. |
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| + | |
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| + | == Faulty SIM slot == |
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| + | |
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| + | This occurs most frequently on newer models of iPhone. Beginning with the iPhone XR (but not the XS or XS Max) the SIM card reader is an independently replaceable part. On previous models, the slot is soldered onto the logic board. |
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| + | * The SIM slot is a frequent entry point for liquids, despite the gasket Apple has utilized since the iPhone 7. Verify the liquid damage indicator inside the SIM slot has not been triggered. |
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| + | * Especially in cases of liquid entry, replacement of the SIM slot is advisable if it is a modular component on your iPhone. |
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| + | |
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| + | == Logic Board Fault == |
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| + | |
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| + | Baseband encapsulates the cellular capabilities of the iPhone. In cases where there is an issue with this board level system, No SIM may present, even if there is a SIM inserted. This is especially prevalent with certain variants of the iPhone 7, which notoriously had a fault with cellular function. |
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