CODEWITHSUNDEEP
javaandroid
Addev
Addev

Reputation: 32243

TelephonyManager.getDeviceId() returns a constant value?

I'm generating a key for obfuscate information.

That key must change between devices so for the generation I was using:

But testing I realised that since TelephonyManager.getSimSerialNumber() changes with the SIM in the device (and in airplane mode always return null) the key also changes and the obfuscated data cant be recovered.

My question is: Does TelephonyManager.getDeviceId() return always the same value (null or a value but always the same result)?

Note: I tested and it returns a valid value for me even in "Airplane mode"

Upvotes: 0

Views: 838

Answers (1)

gheese
gheese

Reputation: 1200

Assuming that the device in question is not rooted (as it allows the user to change most of the unique strings of the device) TelephonyManager.getDeviceId() should return the IMEI number on GSM network - This is linked to handset not SIM and so, it will not change.

Upvotes: 1

Related Questions