This won't throw a TypeError.

NoTypeError.js

// re-written to eliminate need for premises regarding existence of `contacts[i]`.

if ( typeof contacts === 'object' &&
     typeof contacts[i] === 'object' &&
     typeof contacts[i].name === 'object' && 
     typeof contacts[i].name.formatted !== 'undefined' &&
     typeof contacts[i].phoneNumbers !== 'undefined' ) {

    ...
}
else {
    ...
}