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get phone number from sim card with telephonymanager

I want to know that how I can get actual phone number from sim card instead of sim serial number.I have also tried (manager.getLine1Number) but it is giving me null.

Ref: How to get the mobile number of current sim card in real device?
TelephonyManager tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
String number = tm.getLine1Number();
The documentation for getLine1Number() says this method will return null if the number is "unavailable", but it does not say when the number might be unavailable.
You'll need to give your application permission to make this query by adding the following to your Manifest:
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
(You shouldn't use TelephonyManager.getDefault() to get the TelephonyManager as that is a private undocumented API call and may change in future.)
OR
Ref: TelephonyManager give me null
> getLine1Number(); returns whatever is stored on the SIM card's MSISDN,
> which isn't filled by some operators.
In your case i am pretty much sure The MSISDN is unfilled.
You should keep one thing in mind.
getLine1Number() sometimes return with null value or with the phone number originally stored in SIM card.

A null reference might indicate that the phone number can not be accessed.
Documentation:
Note that access to some telephony information is permission-protected. Your application cannot access the protected information unless it has the appropriate permissions declared in its manifest file. Where permissions apply, they are noted in the the methods through which you access the protected information.
Required permissions:
READ_PHONE_STATE, READ_SMS, READ_PHONE_NUMBERS link to method doc
I have also found another question facing a quite similar issue "not working" with the method you named. Someone mentioned a duplicate question there, too. This could also be helpful:
Link
If the code there is not helping you, I would recommend checking the exact documentation of your method to find details, why the null reference has been returned.

how to Obtain mobile number android

I used this code for fetching the number, But it gave me null
TelephonyManager tMgr = (TelephonyManager)mAppContext.getSystemService(Context.TELEPHONY_SERVICE);
String mPhoneNumber = tMgr.getLine1Number();

It may not always return mobile number.
Let me explain how this actually works: When you buy a new SIM card for a new number, the provider had already (though not always) put a mobile number in the SIM (SIM Cards do have a little memory). Now TelephonyManager API tries to read that number. If it is available then it returns the number.
Now, you can get a SIM without a mobile number associated with it. Example - new SIM for porting (where you use previous number in new SIM Card). Those SIMs don't have any number stored on them, and hence TelephonyManager returns null.
Now, even if TelephonyManager returns a number, you should not trust it to be right. Because many devices provide option to edit that number.

To use getLine1Number() you need either READ_PHONE_STATE OR READ_SMS permission. You may be missing that.
And remember that it returns null if phone number string is unavailable.

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.

TelephonyManager is not Providing Phone Number on Every Device

I need phone numbers while developing my application. So, I used TelephonyManager as seen below:
TelephonyManager tmgr =(TelephonyManager)getApplicationContext().getSystemService(getApplicationContext().TELEPHONY_SERVICE);
Log.d("Tag", tmgr.getLine1Number());
But when I tried application in different devices, somehow getLine1Number() not working. I mean returns NULL.
Permission is okay. Finally, does getLine1Number() depend on other requirements? Is it possible to learn phone number on every device.
Thanks for advices.

it is not possible to get phone number on every device because this depends on how sim card is made. This is a sim card limitation.

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.