According to a post on the O2 site, stocks of Apple's latest handset will be "extremely limited" in the UK when it launches later this month, and some customers will experience delays in getting their hands on one.

O2's response to the shortage? Make the new iPhones exclusively available to existing O2 customers, at least until more stock arrives. This isn't just limited to O2 customers who are upgrading from a previous incarnation of the iPhone, but all customers who use O2 mobile, mobile broadband, home broadband or home phone services (provided they have been customers since at the latest 24th May, 2010).

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More on O2's iPhones:

O2 announce Apple iPhone early upgrade deal

iPhone 4 prices unveiled on O2 for June 24th UK release

O2 iPhone customers allowed to unlock for free

O2 to scrap unlimited data plans on iPhone launch day

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O2 will start selling its iPhone 4 from June 24th in O2 shops as well as through Carphone Warehouse, Phones4U and Apple stores, but the handset won't make an appearance in its online shop until the end of July.

Via: o2.co.uk