Tethering iphone4 ios6.1.2 (for Softbank)

1. Add
 http://v.backspace.jp/repo/ 

2. Get 
CommCenter* Patcth ~~~

3. Open
 /System/Library/Carrier Bundles/Softbank_jp.bundle/carrier.plist

4. Modify

type-mask

7

username

dna1trop

-------------------

type-mask

55

username

dna1trop

5. Delete 

/var/mobile/Library/Carrier Bundles/Overlay/device+carrier+44020+N90AP+14.0.plist

6. Reset network