Logo Redesign

To redesign a logo for a telecoms business, with selection of strap lines and letterhead and compliment slip layouts.
The business was set up originally in 2007 to offer low cost mobile phone roaming. That never came to be, as the business focused instead on data SIMs and voice telecoms.
Now the business will revert back to its core function: offering solutions for effortless, good value for money mobile roaming, as well as mobile call security - i.e. to prevent calls from being intercepted. Connected to that latter point, the business will sell high-end personal trackers with emergency buttons to help to keep the "roamers" safe.
The target audience for both the above offerings are business people, and for the roaming SIM solution, people on their gap year and well-to-do tourists visiting multiple destinations who can't be bothered to buy local SIMs.
A key differentiator is that we are friendly, with an empahsis on service. Therefore the logo needs to convey a friendly image, but one with of assuredness, reliability and professionalism. The image also has to be up to date.
I quite like the idea of a logo including a hand-written word, like Virgin's logo, but with perhaps a strong line or symbol to accentuate solidity, assuredness, professionalism. Equally a logo with letters slightly displaced, perhaps might achieve the same effect, again with a contrasting strong line or symbol.
The image must be modern and up to date, reassuring, probably to include black, or derivations thereof. That said, I want the designer just to interpret the brief and provide what will best meet it.