International figures from ABI Research show that 4G data currently costs around 20% more than the equivalent 3G tariff.
However, the research company says there are signs that competition is already causing 4G tariffs to fall.
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The GSMA has announced the results of a study about privacy issues on mobile devices.
It contacted more than 4,000 mobile phone users in Singapore, Spain and the UK to find out how concerned they were about privacy and how this influenced their use of mobile internet services and applications.
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