UPDATE 1-Velti sees a surge in H1 revenue

* Sees H1 total rev more than 20 mln euros

* Says on way to post year of profitable growth

* Signs multi-million deal with Telefonica in Mexico

* Signs 2 medium-term facilities for 10 mln euros (Adds details)

July 2 (Reuters) - Velti Plc (VEL.L) on Thursday forecast net revenue for the first half to rise by more than 50 percent on strong demand for its mobile advertising technology and said it was on course to post a further year of profitable growth.

Total revenue for the first six months ended June 30 is expected to exceed 20 million euros ($28.22 million), the company, which provides software to advertising agencies and mobile operators, said.

"The momentum in revenue growth reflects increasing repeat business from existing clients, as well as significant new client wins across our geographic footprint in Europe, Asia and the Americas," Velti, headquartered in London, said in a statement.

Velti's revenues have traditionally been stronger in the second half and this seasonality will continue, it said.

It has also signed its first multi-million dollar deal in Mexico through a collaboration with Telefonica's (TEF.MC) Movistar which will use Velti's mobile marketing platform, Velti said.

Movistar is one of the largest mobile operators in Mexico with over 16.3 million subscribers, Velti said.

The company said it had secured two medium-term facilities totaling about 10 million euros to fund the acquisition of Ad Infuse, a mobile advertising firm, and for other financing in the future.

Shares of the company closed at 160 pence on Wednesday on the London Stock Exchange. ($1=.7088 Euro) (Reporting by Shivani Singh in Bangalore; Editing by Gopakumar Warrier)