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Explaining iPhone errors (from least to most dangerous)
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1: Lock Screen
Not an error, this means your phone started up just fine
Dangerous Level: 0/5
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2: Siri Not Avaliable
Most common: Your phone isn't connected to the internet
Dangerous Level: 1/5
Rare: Apple servers might be down and you can't connect to them
Dangerous Level: 1/5
3: Cellular Error
Most common: Your SIM is probably damaged, you can get a new one from your carrier for free
Dangerous Level: 1/5
Rare: Your phone's baseband chip didn't update correctly and you have to install an update to fix that
Dangerous Level: 2/5
Extremely rare: Your phone's baseband is dead
Dangerous Level: 5/5
4: Check for Update Error
Most common: You aren't connected to the internet
Dangerous Level: 1/5
Extremely rare: Your iPhone is banned from accessing Apple servers
Dangerous Level: 4/5
5: Diagnostics Menu
Not really an error, this menu is used by Apple to test your device to check for problems
You can access it by pressing volume up and volume down and connecting the power cable while your phone is off
Start Diagnostics
Exit Diagnostics
6: Stuck on Apple Logo
Most common: You probably turned off your iPhone during an update, you can continue updating it with iTunes though
Dangerous Level: 3/5
There are way more reasons why this could be happening, but I just listed the most common one
7: Recovery Mode
Most common: You manually entered the mode via a program, or a button combination
Dangerous Level: 1/5
Rare: iOS is corrupted and can't boot
Dangerous Level: 3/5
Like the apple logo, there are way more reasons why this could be happening
panic(cpu 0 caller 0xd8274ed41): "Unable to find driver for this platform: \"R"N\"\nKernel message: panic
Memory ID: 0x0
OS version: Not yet set
Kernel version: Darwin Kernel Version 16.7.0: Thu Jun 15 17:31:04 PDT 2017; root:xnu-3247.60.1~1/RELEASE_ARM64_S8000
Kernel UUID: 00000000-0000-0000-0000-000000000000
Kernel slide: 0x0000000000000000
Kernel base address: 0xffffff8000200000
panic(cpu 0 caller 0xd8274ed41): "Unable to find driver for this platform: \"R"N\"\nKernel message: panic
Memory ID: 0x0
OS version: Not yet set
Kernel version: Darwin Kernel Version 16.7.0: Thu Jun 15 17:31:04 PDT 2017; root:xnu-3247.60.1~1/RELEASE_ARM64_S8000
Kernel UUID: 00000000-0000-0000-0000-000000000000
Kernel slide: 0x0000000000000000
Kernel base address: 0xffffff8000200000
8: Kernel Panic
This happens when the kernel crashes. This error is extremely rare, and it's usually related to a hardware problem (as it's so rare)
Dangerous Level: 5/5
Here's another photo of the kernel panic
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Should I make a part 2?