Develop Reference

Android Mobile Identification Number (MIN)

My android application needs to retrieve the phone number of the device. I'm using the method getLine1Number() to retrieve it, however on some phones it returns a wrong value.
Code:
TelephonyManager tMgr = (TelephonyManager)c.getSystemService(Context.TELEPHONY_SERVICE);
String number = tMgr.getLine1Number();
The phone returning a wrong value is a Samsung Galaxy S6 running android 6.0.1. In the phone settings under Phone number it displays the same wrong value, however under MIN the correct phone number is displayed.
Can anyone give me any ideas or solutions to this problem? I haven't been able to find any way of retrieving the MIN value from an android phone. Nor have I identified why this phone returns a wrong value.

There is no function to get the phone number of a device. Because of the ways some carriers set up SIMs, its actually possible that the device itself doesn't know what its own phone number is. If you actually need a phone number, you need to ask the user for it. If you need a unique id for the phone, other things like ANDROID_ID are more appropriate (remember not ever android device even has a phone number- tablets, watched, and TVs may not).

best practice to find user phone number in an android application?

I am developing an application that I need to find user phone number.
I founded Telephony Manager but this class does not guarantee that the phone number always returns.so i want to know is there any solution(probably not a straight solution that can i give users phone number because the number does not coded on sim card) in android?

Only few service providers provide phone number via getLine1Number() method. Instead you can get a unique number for each sim using getSimSerialNumber() method.
Ask the user to enter phone number, you can store his simnumber using getSimSerialNumber();
Then authenticate depending on the sim number, this should solve your problem

You don't have much possibilities here you can use either :
TelephonyManager tMgr =(TelephonyManager)mAppContext.getSystemService(Context.TELEPHONY_SERVICE);
String mPhoneNumber = tMgr.getLine1Number();
Which as you said is not guaranteed to always return a number. Or you can ask user to enter the number manually. I think there's no other option.

Android phone number

The following code does not give me the phone number of the device ,how can i get the phone number
TelephonyManager tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
String number = tm.getLine1Number();
Toast.makeText(getApplicationContext(),"Telephone number: "+ number,
Toast.LENGTH_SHORT).show();
ALso i have tried the following..but the number doest show up
Programmatically obtain the phone number of the Android phone
How to get the mobile number of current sim card in real device?

The only method available from Android API as all the comments suggest is getLine1Number(). However I have never been able to obtain it since your operator must provide you with a SIM that supports letting phone read internal phone number. That seems not very common, so I am afraid that you could be left without means of knowing it.
That's why some programs that use your phone number to identify you (i.e. Whatsapp) do ask user about his/her phone number, because there is no sure way to getting it programatically.

the code provided:
TelephonyManager tMgr =(TelephonyManager)mAppContext.getSystemService(Context.TELEPHONY_SERVICE);
mPhoneNumber = tMgr.getLine1Number();
should work fine, however, it will not if you forgot the permission "READ_PHONE_STATE".
Hope this works now :)

Try this:
private String getMyPhoneNumber(){
TelephonyManager mTelephonyMgr;
mTelephonyMgr = (TelephonyManager)
getSystemService(Context.TELEPHONY_SERVICE);
return mTelephonyMgr.getLine1Number();
}
Hope it help you

[In case if anyone still stumbles here looking for this still existing age-old problem]
AFAIK, TelephonyManager.getLine1Number() is not reliable due to various constraints from operators.
There are some java reflection based hacks but varies from device to device thus making those hacks sort of useless [at least in terms of supported models]
But there is a legitimate lawful logic to find the number, if you really need so. Query all the SMS by sms provider and get the "To" number.
Extra benefits of this trick: 1. you can get all the line numbers if there is multi sim in the device.
Cons: 1. you will need SMS_READ permission [sorry for that]
2. You will get all the sim numbers ever used in the device. this problem can be minimised with some constraint logic e.g. time frame (sms received or sent only today) etc. It would be interesting to hear from others about how to improve this case.

How to get your own phone number in Android

I am trying to develop an application that needs the phone number of SIM Card every time a new SIM Card is inserted in the phone....Then i will use that phone number to get the user subscribed to an online server.I have read many forums and found something like this
TelephonyManager tMgr =(TelephonyManager)mAppContext.getSystemService(Context.TELEPHONY_SERVICE);
mPhoneNumber = tMgr.getLine1Number();
but everyone said that this is not an efficient method.If this is not an efficient method then which is the efficient method and also I cannot use any other property like SIM id or Subscriber ID etc.I only need the PHONE NUMBER. Any help would be appreciated.

As far as I know, this method would not always return right SIM number; it depends on the SIM card itself.
If you really want to get the SIM number, you can send a SMS to a specific phone, so you will get it.

TelephonyManager is not the right Solution,Because in some cases the
number is not stored in the SIM, Due to my suggestion,You should use
Shared Preference to store user's Phone number first time the
application is open, and after that the number will used whenever you
need in application.
Thank you.

how to obtain mobile number of own device in android?

I want to retreive mobile number of device programatically. My code is:-
TelephonyManager telephonyManager = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
String strMobileNumber = telephonyManager.getLine1Number();
and I have set READ_PHONE_STATE permission in AndroidManifest.xml file. This is working on emulator but on actual device with eclair version, it is returning empty string. Is there any other way to get mobile no?

There is no reliable way to "retreive mobile number of device programatically", AFAIK. getLine1Number() reports the number supplied by the SIM card for GSM phones, and the mobile number does not need to be on the SIM card.