In fact, the operators a phone number, cellular

How to operate virtual operators telephone number cellular?

They have the cheapest season tickets in the market.

When You are running low on a temporary or contract you have a contract of indefinite duration, you can change providers and pay lower bills.

Take into account not only price but also from whose antennas (base stations) uses the operator (T-Mobile, Orange, Play " or "Plus") - because it is they who decide on the range.

At any time you can withdraw from the contract.

A big plus is that in most cases conclude with a virtual operator agreement of indefinite duration.