We would like to use cookies to ensure we give you the best experience on our website, read more here. If you consent to us using cookies, please click 'Accept Cookies'.

0800 0646464

Customer Zone - Get Started

Useful information:

Once you have your new mobile account up and running, it is worth making note of the useful numbers available to you to either set up your voice mail, or avoid any traffic on the roads with O2’s Trafficline service. Click here for Useful Numbers.


Setting up your new devices:

For more advice or assistance on setting up your new devices, please ring our customer care team on 0800 0646464. 


Setting up your O2 billing:

My O2 Business allows you to stay in control of your O2 mobile, landline and broadband accounts, online 24/7, from one place. This service is also free, and enables you to view current tariff and allowance information. Please speak to your account manager for assistance on setting up your online billing, understanding your first bill, and how to download, analyse and email invoices and itemised data to yourself. Unlimited calls to the 10 UK landlines you call most. – Once we have viewed your bills, we will be able to help you establish which 10 UK landline numbers you call then most, to take advantage of these free unlimited calls. Your account manager will work with you to identify this and can either set it up on your behalf or show you how you can do this via your My O2 Business log in. 


Understanding your first O2 bill:

Your line rental is invoiced a month in advance, but your calls are invoiced at the end of the month. So for your first bill it includes line rental for the days you've been with us so far. Plus next month's line rental in advance. Say you joined O2 on the twentieth of the month. Your first bill will cover line rental from the twentieth to the end of the month. Plus any calls you've made or data you've used in that time. Along with line rental for the whole of next month. If anything's unclear with your bill, please get in touch. If you have any queries regarding your O2 billing, please call 0800 0646464 to speak to our Customer Care team or email customercare@welcomm.co.uk. 


Unified Billing: 

If you have Unified services with Welcomm - including landlines, Horizon, SIP Trunks and Data - Welcomm's in-house account team will reconcile your billing and email it across to the lead person on your account each month. If you have any queries regarding your bill, please contact the accounts department on 01858 414 199 or email billing@welcomm.co.uk.