You must provide more info. Hacking is not just press a button and it happens.
Information that would be of help so people can answer you question:
1) Current running Version of OS
2) Is Device Rooted?
- If not
- Do you know what rooting is and how to?
3) Your knowledge of terminal commands?
- If you root your device Would you now how to use terminal?
4) type of router you trying to hack
5) Password encryption type of router
6) open ports on router
7) Do you have any programming experience