Samsung “isn’t sure” about announcing its next-generation Galaxy S5 at Mobile World Congress next month after reliable Russian tipster Eldar Murtazin revealed the date of the event. Murtazin now believes the South Korean company could delay the announcement and hold a special event in London as previously reported.

We weren’t expecting a Galaxy S5 announcement until mid-March anyway — but when speculation surrounding a February release began hotting up earlier this week, we thought Samsung may be set to surprise us. Murtazin said the company’s event was scheduled to go ahead in Barcelona on February 23 — a day before MWC — at 6 p.m. local time.

But early this morning, Murtazin followed up with a new tweet that said Samsung is no longer sure about the place or date of the Galaxy S5 unveiling following his leak. “They think about London again,” he said, before promising further information in the coming days.

Samsung isnt sure about place/date of sgs5 anounce after yesterday leak :))) they think about London again, info will be in a few days 🙂

— Eldar Murtazin (@eldarmurtazin) January 23, 2014

The earlier event hasn’t been completely scrapped yet, though; it’s still scheduled for February 23 as things stand.

Whatever the actual date may be, we expect the Galaxy S5 to introduce Samsung’s latest TouchWiz user interface, new iris scanning security technology, and of course, new internals that include a faster processor, a bigger battery, and a much-improved rear-facing camera.

• SourceEldar Murtazin