The HTC One M8 has been available at select carriers immediately after its unveiling on March 25, but the handset has now extended its availability.

HTC's latest flagship smartphone has now hit more than 100 countries on as many as 230 carriers, widening its reach. Major carriers in the U.S. and Canada were among the first to start offering the HTC One M8, and the smartphone is now more widely available. Here's which carriers and retailers are now selling the HTC One M8 and for how much.

Unlocked HTC One M8

The unlocked version of the flagship costs $699 and is available in three color options: Glacial Silver, Gunmetal Gray, and Amber Gold. Interested buyers who make their purchase from HTC's website will also benefit from free express shipping.

HTC One M8 Developer Edition

The Developer Edition of the new HTC One also retail for the full price of $699, but is only available in Gunmetal Gray and Amber Gold color options, without the Glacial Silver. As with the unlocked model, those who purchase the HTC One Developer Edition from HTC's online shop will get free express shipping.

Carrier Versions and Offers

• Sprint HTC One M8

Sprint is offering the latest HTC One M8 for $99.99 with a two year service agreement. Interested customers can also go for Sprint's Easy Pay plan, getting the smartphone for $0 down and 24 subsequent monthly payments of $27.09. Those who want to purchase the HTC One M8 off-contract from Sprint, meanwhile, will have to shell out the full retail price of $649.99. The carrier will only sell the Gunmetal Gray version of the smartphone. For more information, visit Sprint's product page at this link.

• AT&T HTC One M8

AT&T is also selling HTC's new flagship smartphone for $199.99 with a two-year contract, but interested customers can also choose one of the carrier's AT&T Next plans. With the Next 18, the HTC One M8 will cost $24.62 per month for 26 months, while the Next 12 plan will offer the handset for $32 per month for 20 months. The outright, off-contract plan of the AT&T HTC One M8 is $639.99. AT&T is also selling only the Gunmetal Gray version of the smartphone. For more details or to place your order, find the HTC One M8 on AT&T here.

• Verizon Wireless HTC One M8

Just like AT&T and Sprint, Verizon is also selling the HTC One M8 for $199.99 with a two-year service agreement. With Verizon Edge, meanwhile, interested buyers can get the new HTC flagship for $0 down and 24 subsequent monthly payments of $25.22. The full retail price of the HTC One M8 off-contract through Verizon is $599.99, which is a better deal than what Sprint and AT&T are charging. Verizon is also selling only the Gunmetal Gray version of the smartphone, and the carrier also has a very attractive deal in place. With Verizon's latest buy one, get one free offer, customers who purchase an HTC One M8 from the carrier can get another one for free, or get a free Samsung Galaxy S5 or Samsung ATIV SE after a $50 mail-in rebate. Taking advantage of this offer means agreeing to sign a contract for each device. Find more details on Verizon's website at this link.

• T-Mobile HTC One M8

The HTC One M8 hasn't gone live yet on T-Mobile's website, but the carrier is set to start offering the smartphone on Friday, April 11. At the time of writing only a "Notify Me" option is available, but the handset should go on sale any time now.

Retailer offers for the HTC One M8

• Amazon

Amazon is offering the HTC One M8 for AT&T, Sprint, and Verizon Wireless. The AT&T model costs $199.99 with a two-year contract and $649.99 off-contract, while the Sprint and Verizon models cost $149.99 with two-year service agreements or $699.99 and $649.99 off-contract, respectively. Amazon is also offering the factory unlocked HTC One M8. For more details on Amazon's HTC One M8 offers head over to the retailer's website at this link.

• Best Buy

Best Buy is also selling the AT&T, Sprint, and Verizon models of the HTC One M8, but the retailer also has the exclusive on the Amber Gold color option of the smartphone for the three carriers. The AT&T and Sprint models cost $199.99 on-contract, while the Verizon version costs $149.99, also on contract. Aside from the exclusive Amber Gold color option, Best Buy is also offering the Gunmetal Gray and Glacial Silver versions of the smartphone. Find more details here.

• Radio Shack

Radio Shack is offering the AT&T, Verizon, and Sprint HTC One M8 for $199.99 with a two-year contract. For more details, head over to Radio Shack at this link.