T-Mobile's pre-orders for the LG G5 will begin on March 29th, and the phone will ship to retail on April 1st. Folks who pre-order before April 5th will also be treated to a free 360 Camera module "friend" for the LG G5. Customers who purchase the phone before April 17th (pre-order or retail sales) will also get a free battery pack and a charging cradle as well.
Here's a quote with a few more details,
"The LG G5 will be available at the Un-carrier for $0 down and $26.25 over 23 months, (24th payment of $26.24, FRP: $629.99) with T-Mobile’s interest-free financing plan. For more information on the LG G5 at T-Mobile – and to sign up to receive more information about the launch offer once available, visit: LG G5 Pre-registration | LG G5 Smartphone Phablet | T-Mobile."
Be sure to drop by our dedicated LG G5 section for further discussion: LG G5
Source: T-Mobile