Hushed is a very useful app for making cheap international calls and sending private SMS and MMS from your android device. With hushed your mobile or tablet can have unlimited disposable phone numbers. Many different plans for 7day, 30day, 90days and 365 days plan. Hushed also provides the first number for free, while the other number have to be purchased at a reasonable rate. Every hushed number comes with its own voicemail. Destroy all the hushed numbers as soon as you have used them. You can turn off the notifications, put in stealth mode, has PIN lock feature for privacy.