2021年10月19日 · Fixed dialing allows you to block outgoing calls (except emergency calls), while incoming calls are not restricted. Fixed dialing numbers (FDN) on the Android smartphone must be enbaled in the phone settings using PIN2. We can also create a list of phone numbers that are allowed to be called.

Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2]

2023年12月11日 · Fixed Dialing Numbers, also known as Fixed Dialing Mode, is a common feature on GSM mobile phones that allows users to restrict outgoing calls to only a specific list of pre-approved numbers. Once FDN is activated, the phone will block calls attempts to any numbers not on the FDN list, with the exception of emergency service numbers.

2016年4月21日 · Fixed Dialing Number (FDN) is a service mode of a GSM phone's Subscriber Identity Module (SIM) card. Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes.

固定拨号（Fixed Dialing Number， FDN） 这个功能是为了在手机借给第三方的时候防止非授权使用的。 即A用户把手机借给B用户，只限定B用户拨打A用户指定的号码，非指定的号码不能拨出，这个功能同时也适用于在集体条件下（比如放在集体宿舍充电）防止别人使用，而且不耽误来话，但是经过使用发现，SIM中的存储固定号码的空间太小了，普通的32K SIM卡只能存一个电话号码，动感地带32K SIM卡只能存两个号码，64K 大容量SIM卡也只能存两个。 当启动固定拨号 …

2020年4月6日 · Learn how you change PIN2 for FDN access (Fixed Dialing Number) on Galaxy S20 / S20 Plus / S20 Ultra. ...more. Android 10.

2020年10月13日 · FDN (Fixed Dialling Number) or FDM (Fixed Dialling Mode) is a service mode of GSM phone's Subscriber Identity Module (SIM) card feature that allows the phone to be "locked" so that it can only dial certain numbers, or numbers with certain prefixes.Incoming calls are not affected by FDN service.

2025年2月19日 · In GSM phones, the Fixed Dialing Model (FDM) is a service mode for locking the phone so that it can only dial certain numbers or numbers with a certain prefix. Please find the process to enable the feature. The feature does not allow dialing any other number except for the fixed dialing number. To enable the option please follow the below step.

2024年6月26日 · Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone’s SIM card. It allows you to add specific numbers to a list, and when activated, only those numbers listed, or numbers with certain prefixes, can be dialed.

2021年6月9日 · We can restrict and specify which phone numbers or numbers with area code are allowed to be dialed from the Xiaomi smartphone. Note: PIN 2 is required to enable or disable Fixed Dialing Numbers (FDN). Download instructions? If you need the manual often or offline, you can download it here as a PDF document for free.