For unlimited calls to anyone on O2 join Best for Business Unlimited* Business customers inclusive calls to any O2 mobile with our range of Best for Business Unlimited.

Click here for our tariff's

That’s 15 million people they can call as much as they like.*

A few great reasons to buy Best for Business Unlimited

• There are no restrictions – calls can be any length and made at any time.
  
• When we say any O2 mobile we mean it, so that includes:
  
  • O2 Pay & Go™ and Pay Monthly
  • O2 mobiles inside and outside a business account
  • Colleagues, suppliers, friends and family
    
• Customers can use their mobile instead of a fixed-line to call other O2 mobiles