Android applications provided by the Federation of credit unions (credit unions 2-channel authentication app) is an application that allows using the smartphone can be a two-channel authentication in Internet banking credit unions (openbank.cu.co.kr).
After installing the application Credit Union Internet Banking (openbank.cu.co.kr) Register your app from -2 additional service channels app authentication service, you can get an additional authorization on your smartphone.

[When using the two credit unions Channel App Certification requires the following rights;

1. Mandatory Restrictions
- Storage: if the app needs to authenticate and register the app stores your configuration information.

2. Choose restrictions
- Tel: You need to make a call from inside the app, the customer service center.
※ selective approach does not agree to allow the authority one can use the service, features that permission is required can be provided is limited.

※ After the agreed access rights, you can reset the access or withdraw, as follows:

[Android 6.0 or later;
1. withdrawal by one access method: Device Settings> Apps> More (configuration and control)> App Setup> App Permissions> select appropriate restrictions> Restrictions consent or withdraw choice
2. How to withdraw by app: Device Settings> Apps> Select your app> select Rights> restrictions consent or withdraw choice

[Android version less than 6.0;
Since the operating characteristics Restrictions stars withdrawal is impossible, you can withdraw one access only if you delete the app. I recommend CALL upgrade your Android version.