News In Brief: Deutsche Telekom, Telekom Srbija, Twitter, Voice Commerce, ZTE, Redknee, UnisonFibre

Deutsche Telekom’s exclusive hold on the iPhone 4 in Germany will end in a matter of weeks, as Vodafone and O2 confirm they are close to launching the device, reports.
Serbia’s government will issue invitations to bid for 50% of Telekom Srbija this week aiming to make at least €1.4 million from the sale, Bloomberg reports. Citigroup valued the telco at €3.2 million in August.
Twitter is signing up around 1.8 million users every week and is aiming for a billion members, according to co-founders Biz Stone and Evan Williams.
Financial services provider Voice Commerce predicts 500 million subscribers will generate mobile payments of £20 billion (€22.7 billion) in four years.
ZTE launched its latest touchscreen tablet in China yesterday. The Light weighs 403 grams, offers 3G voice and HSUPA data connections, and runs on Android.
Billing software provider Redknee has hired Joseph Abounajm to head its Middle East and Africa division. Abounajm joins from a similar post at International Turnkey Systems.
New Zealand's UnisonFibre has contracted Alcatel-Lucent to implement IP/MPLS infrastructure for its fiber networks.
Telenor is pitching for a slice of the digital coupons market, unveiling a joint venture with PayEx offering digital coupons, vouchers and tickets. Telenor holds 51% of Valuecodes, which will develop software to generate and distribute e-vouchers.
Separately, Telenor unveiled its first mobile bundle for small business users, combining voice and broadband access.