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iPhone X

Since 1991 I use pda's and since 1994 mobile phones. Since 2005 I use a smartphone which combines both. After a >Palm Treo 650 I used an >iPhone 3GS, >iPhone 4, >iPhone 4s, >iPhone 5, >iPhone 5s, >iPhone 6 and since 2017 an >iPhone X.

On this page I would like to talk about a few quirks and missing functions, as well as tips for the usage.


Profile Short Usage Sample Products
Advanced Audio Distribution
A2DP Audiotransfer Audioplayer, Headphones, Micro
The Advanced Audio Distribution Profile supports the transmission of stereo audio data between two devices, e.g. between a pc and a headset. There are two different roles within this profile - one unit is the source (A2DP-SRC) and the other one the sink (A2DP-SNK).
Audio Video Remote Control
AVRCP Audio/Video Remote Control PC, VCR, DVD-Player
The Audio Video Remote Control Profile enables mobile Bluetooth devices to act as a remote control for audio- or video devices. Instead of a simple remote control unit the controler may also be a pc, mobile phone or pda. There are two different roles within this profile - one unit is the controler (AVRCP-CT) and the other one the target (AVRCP-TG).

AVRCP support in the iPhone is limited to pause/play/stop prior to iOS 4.1
Hands Free
HFP In car telephony Phone, Hands free kit
The Hands Free Profile supports the use of a car kit. It manages the communication between a car kit and a mobile phone via Bluetooth. There are two roles in this profile. The car kit is called HF-Unit while the mobile phone is called HF-Audio Gateway.
HSP Headset voice output Headset
The Headset Profile supports the usage of wireless headsets, e.g. sound input and output for a mobile phone or VoIP calls with a computer. The possible quality is only sufficient for speech. For music the A2DP profile is used. There are two roles in this profile. The headset is called Headset-Headset while the opposite unit is called Headset-Audio Gateway. The Headset Proile uses services of the Serial Port Profile (SPP).
Human Interface Design
HID Inputs Keyboard, Mouse, PC
The Human Interface Device Profile supports the wireless use of input devices like mice, keyboards or joysticks. There are two roles in this profile. Input devices are called HID-Client and receivers as HID-Unit.

HID support was introduced to the iPhone in iOS 4.0.
Message Access Profile
MAP Message exchange between devices Phone, Car Kit
The Message Access Profile supports exchange of messages between devices. Mostly used for automotive use where an on-board device (typically a hands free car kit) can exchange messages with another device (typically a mobile phone).

MAP support was introduced to the iPhone in iOS 6.0.
Personal Area Networking
PAN Network connection Access Point
The Personal Area Networking Profile supports networks in personal areas. Through these ad-hoc networks up to eight devices can exchange data. Devices like harddisks, internet access or printers may be used like in local networks (lan). There are two different roles. A PAN-Access Point can provide a network access to other Bluetooth devices which are called PAN users or act as a master in a PAN group. This network can consist of up to seven PAN users via a PAN-AP. Two PAN users may otherwise connect directly with each other without a PAN-AP.
Phonebook Access Profile
PBAP read phonebook Phone, Car Kits
The Phonebook Access Profile supports read access to a mobile phone's phonebook for other devices.

The Bluetooth implementation in the iPhone is quite rudimentary and only supports the profiles mentioned above. Here you will find >Infos about all Bluetooth profiles.


The Calendar in the iPhones looks great at first sight but lacks some major features while using:



The very simple Notes app in the iPhone has nearly no functions. Notes can only synced with Apple Mail and are not password protectable. As an alternative I use >Notebooks which adds a lot of other features and syncs via WebDAV or SyncDocs with the computer.


In iTunes switch import prefs to AAC stellen. Then right click on a song and select a maximimum 30 seconds long range in options by changing th "start at" and "stop at" values. Afterwards one can right click on the song and select "Convert selection to AAC" in options. The selected range is saved to a file with the extension .m4a. This file is then renamed to the extension .m4r which is Apple's extension for ringtones. In iTunes, you can now select the desired iPhone left in the menu bar and choose „On my device“ ▸ „Tones“. Then drag the ringtone into the window on the right.

SIM Lock/Netlock

To offer mobile phones at decent prices mobile service providers subsidize them and get their return on pricy contracts - Rockefeller did that before. To ensure the mobile phone earns its money it's protected with a SIM lock (works only with a SIM card from the mobile service provider) or netlock (works only in the mobile network of the provider). On the iPhone this protection is quite sophisticated and may only be deactivated by Apple on request of a mobile service provider. The removal is then processed at next syncronization with iTunes. In Germany this can be done e.g. after 24 months >online by Telekom. In the form one can also see when the removal can be done. Often iPhones are offered with a supposed Telekom netlock. If one wants to used that phone within the Telekom network with a discounted Congstar card one will be out of luck. Out of unknown reasons the card is accepted by the iPhone but the phone doesn't work. So it's de facto kind of a SIM lock.

Visual Voicemail

If one uses the iPhone with a mobile service provider supporting this feature one can use this comfortable notification of incoming messages called Visual Voicemail by Apple. Since the end of the Telekom distribution monopol in Germany it's offered e.g. by >Vodafone and O2. Please have in mind that sometimes the provider has to know an iPhone is used to enable this option. Important is hereby the provider and not the network. E.g. the Telekom discounter Congstar does not support this while Telekom does.


If you don't use your iPhone in an Apple approved mobile network in your country but for example with Vodafone Germany the voicemail key in the telephone app is not assigned at first. You can do this by entering the digits ✱5005✱86✱5500# and hitting the green phone symbol where 5500 is the number of the Vodafone voicebox.


A screenshot can be taken by holding the home button and clicking the on/off key at the same time. The produced JPEG picture is saved in Photos and transmitted at next sync.

Deactivating Touch ID

Touch ID or Face ID can be quickly disabled since iOS 11 by pressing the power button and one of the volume buttons simultaneously. This can be useful to prevent the forced unlocking by third parties.

Emergency SOS

iPhone X Emergency SOSThe emergency call is activated by pressing the power button five times. A countdown counts from five to zero. Then the local emergency number is called. If one has stored emergency contacts on the iPhone, they will be automatically notified by text message including the current location after the emergency call. However, this can be deactivated.

Net monitor

The net monitor can be activated by entering ✱3001#12345#✱ (green handset).


Using the iPhone as a data modem via usb or Bluetooth is called Tethering by Apple. This may be activated since iOS 3.1.3 for unlocked iPhones.


The >iPhone X supports LTE on nearly all worldwide used frequencies (1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28/29/30/34/38/39/40/41/66). That wasn't always self-evident. E.g. the >iPhone 5 worked in Germany only within the Telekom network due to its supported frequency bands 1 (2100 MHz), 3 (1800 MHz) and 5 (850 MHz). Of these in Germany only band 3 is used and only by Telekom in cities.

The >iPhone 5c and the >iPhone 5s support the LTE frequency bands 1 (2100 MHz), 2 (1900 MHz), 3 (1800 MHz), 5 (850 MHz), 7 (2600 MHz), 8 (900 MHz) and 20 (800 MHz). Learn more about >all LTE frequencies worldwide.


Since the >iPhone 6 and >iPhone 6 Plus VoLTE is supported. Thus the smartphone stays in the LTE network also for voice calls while older iPhones had to revert to 3G or 2G.>More information about VoLTE

Wirless Charging

Since the >iPhone 8, >iPhone 8 Plus and >iPhone X wireless charging is supported.
Find out more about >the used wireless charging standard Qi.

Activation Lock

Image of
activation lock on iCloud websiteiPhones may be secured with an activation lock. Without identifying with ones Apple ID it is impossible to deactivate "Search my iPhone" on the device, to logout of iCloud and to delete or activate the device. Thus a stolen iPhone is pretty useless for thieves.

Since iOS 8 the activation lock is activated by default. On iOS 7 one has to activate it. On the Apple iCloud page the status of the Activation Lock could be checked until the end of 2016. Unfortunately this is no longer possible.

Service & Support

The Service and Support coverage may be checked on the >Support-Homepage of the manufacturer with the devices serial number. this may be checked on an iPhone at Preferences > General > Info and on the Mac in the system report. Apple shows the following information:


Does iPhoto open each time the iPhone is connected? This may be switched off/on but it's not within the prefs of iPhoto or iTunes as one might expect but hidden in the program Digital Photos. Hidden is more or less literal as the function lies in the lower left corner behind the icon
with arrow up icon. Here one may choose if and which program opens when a device with pictures is attached. This may be a camera, drive or storage card.

SMS > England

If SMS to +447537410230, +447537410280 or +447537410200 appear on your cellphone's monthly bill these are caused by the iPhone sending them automatically at each activation and deactivation of Facetime or iMessage. There is a discreet note from Apple at the activation prompt about this behavior.


>Official Apple iPhone website


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