These codes is copied from a chinese forum and I had tested all codes. Some work but some not work. Sorry about my English.
"* # 8702 #" - Phone hardware testing (with Chinese language. Can anyone translate them??)
"* # 837500 #"...
Here my backup from my E7 Vietnam. It's look like India rom so Indian may use this.
Language: Chinese, English and Vietnam.
Restore it with CWM https://drive.google.com/file/d/0B_mKjw0UfsOYNlJQUHE0R3Fxa28/edit?usp=sharing