gistray:
Please help me answer this, I know the reward money is small but I need an answer.

How does PalmPay mobile app Knows a device Android/iPhone have been used to access the App before? I'd love to implement this feat Tom an my App.

It is not any of the following:

It is not via Storing the Device IMEI Number.
We got an Android, registered a PalmPay account with it, then change the IMEI number of this Android and tried registering a new account.

Palmpay was able to detect the device has been used before.


It is not By detecting device Build Number or MAC address, those where changed too.


It is not by storing cookies or some form of secret on the device, we cleared the app cache, uninstall it and removed all the app data yet it was able to detect it has been used before.




Only way PalmPay was able to view the device as new was After a hard factory reset.



Do Dev in the house, what magic is PalmPay doing here?

gistray:
Please help me answer this, I know the reward money is small but I need an answer.

How does PalmPay mobile app Knows a device Android/iPhone have been used to access the App before? I'd love to implement this feat Tom an my App.

It is not any of the following:

It is not via Storing the Device IMEI Number.
We got an Android, registered a PalmPay account with it, then change the IMEI number of this Android and tried registering a new account.

Palmpay was able to detect the device has been used before.


It is not By detecting device Build Number or MAC address, those where changed too.


It is not by storing cookies or some form of secret on the device, we cleared the app cache, uninstall it and removed all the app data yet it was able to detect it has been used before.




Only way PalmPay was able to view the device as new was After a hard factory reset.



Do Dev in the house, what magic is PalmPay doing here?

jackmrandy:


you dey find solution to your assignment

jackmrandy:


Cookies: When a user uses an app, a small piece of data known as a cookie can be stored on their device. Cookies can contain information about the user's session, preferences, and previous interactions with the app. By checking for the presence of a specific cookie associated with a previous registration, the app can determine if the device has been used for registration before.
a

Sapeleboy911:
Almost all banking Apps including GTBank, Opay, etc. Except you do a hard reset, the app always detects that it has been installed on such a device before even if you clear storage, change your Mac address, or the Play Store account.It still detects it.


Applications have something known as device token saved on the server to send you notifications and other stuff.
When you install an app, a unique token is generated by your device, that is specific to that app and the device.
So whenever you install the app, the provider checks for that token on their server, if it exists already, then you have installed that app on your device at some earlier point in time, if not, then it is stored for future refrence.
Source: Quora

westlius:
As long as the Internet connection is on, it can detect when an android or iphone. The last minute is own its detected in there software.
My 5k assap

gistray:



Where is the token stored?

The device or the app server?

If it's stored in the device then a hard reset shouldn't be able to delete it and make the device appear new to the app?

Sapeleboy911:

App server.

gistray:


By this a hard reset shouldn't make the app see the device as new since the token is stored in the app server

Sapeleboy911:

I hope you know what a hard reset is?

gistray:
Please help me answer this, I know the reward money is small but I need an answer.

How does PalmPay mobile app Knows a device Android/iPhone have been used to access the App before? I'd love to implement this feat Tom an my App.

It is not any of the following:

It is not via Storing the Device IMEI Number.
We got an Android, registered a PalmPay account with it, then change the IMEI number of this Android and tried registering a new account.

Palmpay was able to detect the device has been used before.


It is not By detecting device Build Number or MAC address, those where changed too.


It is not by storing cookies or some form of secret on the device, we cleared the app cache, uninstall it and removed all the app data yet it was able to detect it has been used before.




Only way PalmPay was able to view the device as new was After a hard factory reset.



So Dev in the house, what magic is PalmPay doing here?

etoluw:


whatsapp me , i go explain how it works for you

gistray:


Send your number

chukwuebuka65:
.

Sapeleboy911:
Almost all banking Apps including GTBank, Opay, etc. Except you do a hard reset, the app always detects that it has been installed on such a device before even if you clear storage, change your Mac address, or the Play Store account.It still detects it.


Applications have something known as device token saved on the server to send you notifications and other stuff.
When you install an app, a unique token is generated by your device, that is specific to that app and the device.
So whenever you install the app, the provider checks for that token on their server, if it exists already, then you have installed that app on your device at some earlier point in time, if not, then it is stored for future refrence.
Source: Quora

HelpMeee:

Any time the app's storage is cleared or the app is reinstalled,the previous token becomes invalid and a new one is generated,hence merely having a list of old tokens isn't sufficient.
A possible solution is that,in addition to having a token in their server,that token also has to be stored somewhere in the device's phone memory.
So anytime the app is reinstalled,the token in the phone memory is what's used to compare with the tokens in the server. That's the reason hard resetting the device clears the token in the phone memory and the device is seen as a new one since no token can be found in memory.

Source: I've done this before.

dongeneral455:
DEVICE ID
It is very common, and perfectly reasonable, for a developer to want to track individual installations of their apps. It sounds plausible just to call TelephonyManager.getDeviceId() and use that value to identify the installation.
Every Phone has its own unique ID which can only be reset when the owner runs a "Factory reset" on their device.

silento:
Simple answer is your JWT token on the server

Any data clear or reset renders the old token on server useless , but still can be used to check infos

gistray:


If it's on the service then factory reset won't Make the device appear new to the app... After all the app have no way to know I did a hard reset

Testing out the App ID the person above suggested.

silento:



If u really under stand how jwt works u will know where am coming from

devdev:
send me a pm or whatsapp to explain to you