This is PRO Version without Ads.
Using SIMToolPro you can look your SIM Card information
Manage your phone contact number
Add new contact delete contact export into sd card and import again into phone.
Seeing hidden contact due to SIM network.

WARNING!
This is the PRO version without ads! Features contained in the app is same to the free version with ads included. (No more features in this app!) If you buy this app you will get it without annoying ads. So be wise before buying!!!