Three of Asia’s major smartphone manufacturers, LG, HTC and Sony, have all unveiled new flagship smartphones at the Mobile World Congress this week.

Interestingly, out of these and other businesses announcing their own handsets, only Sony has still opted for dual-core smartphones. The rest apparently are going to make quad-core devices.

For instance, Sony said it was developing its Xperia range, first announced when it was Sony Ericsson last year. The new handsets – codenamed P and U – are thought by many to be mid-range smartphones.

Sony also told delegates at the congress that it intends developing the integrative approach to music, video and games on smartphones. The new chief executive of Sony also said that the devices will also sport improved displays as part of its overall strategy. The new P model, for example, will feature something called White Magic, which helps users see their display better when outdoors.

This contrasts with HTC who, as intimated above, are developing a quad-core phone. The Taiwanese company also said that it is concentrating on improving the Dropbox relationship it forged last year. Dropbox allows smartphone users to back-up files on the cloud.

Like HTC, LG’s focus is on making quad-core devices. Its latest smartphone unveiled at the MWC is the Optimus 4X HD, which features a four-core processor and a high definition screen. It also has 4G technology inbuilt. However, since only the USA has 4G technology at the moment, the phone is probably destined for that market.

That may change though if Everything Everywhere manages to develop 4G in Britain later this year.