O2 union members have approved a two year pay deal by four to one in a ballot.
Members of the Communications Workers Union (CWU) will receive the rise, which has been backdated to the April 2010, in their August salaries.
The pay deal, which was negotiated in July, went to the ballot to be approved by the members.
Most O2 staff will receive a 2.5% pay rise effective from the 1 April and 2.75% from 1 April 2011.
CWU deputy general secretary, Andy Kerr, said: ‘This is a strong result for a good pay deal. The majority of staff in O2 can now look forward to decent pay rises for this year and 2011 and bank on that stability.
‘This year’s pay negotiations with O2 were protracted and further complicated by our insistence on making progress on pay progression. We’re really pleased with the breakthrough on this issue, which will now benefit potentially thousands of O2 staff.
‘This two-year deal provides stability for both the company and our members at a time of economic uncertainty. We’re really pleased with ballot result and now look forward to working with the company on other work issues.’
CWU represents over 3,000 O2 staff across call centres, retail and engineering roles.