Pre-order for the iPhone SE started on 24th March 2016 and it will be launching tomorrow, Thursday, 31st March 2016.
With regards to LTE networks in Singapore, for the iPhone SE model we are getting the A1723 (GSM).

The Samsung Galaxy S7 4G+ and Samsung Galaxy S7 edge 4G+ will be officially available in Singapore from Saturday, 12th March 2016.
In Singapore, both the S7 and S7 edge will come in only one size which is 32GB because it now comes with expandable memory slot via microSD (up to 200GB).
The BlackBerry PRIV is BlackBerry’s first Android phone and it will be available in Singapore from 12th December 2015.
The recommended retail price for the BlackBerry PRIV is S$1,098 and it will be available for purchase from Singtel, M1, StarHub and other BlackBerry authorized partners.
Just to recap on my previous post about Nexus 6P availability & price in Singapore, the Nexus 6P is brought in by Huawei through Convergent Systems.
Only the 64GB and 128GB model will be available in Singapore. And each of the model will be available in two colors, Graphite and Aluminium.
The ZTE Axon Elite was officially launched in Singapore on 3rd October 2015 exclusively for M1 customers.
From mid-October onwards, you can get it without contract from Challenger, Gain City and abonlineshop.com for a recommended retail price of S$699.
The iPhone 6s and iPhone 6s Plus will be launching on Friday, 25th September 2015 at 8am at Marina Bay Sands, Exhibition Hall D, Basement 2.
With regards to LTE networks in Singapore, for the iPhone 6s model we are getting the A1638 (GSM) and for the iPhone 6s Plus model, we are getting the A1687 (GSM).
The Samsung Galaxy Note 5 4G+ was launched in Singapore last Thursday and it was available for sale 2 days later on last Saturday. Two colors will be available at launch, the Black Sapphire & Gold Platinum. The 32GB variant will retail for S$1,088 and the 64GB variant will retail for S$1,188.
Also introduced last Thursday was the Samsung Galaxy S6 edge+ 4G+. It will be available for sale starting today. Similar to the Note 5, two colors will be available at launch, the Black Sapphire & Gold Platinum. In terms of pricing, it will be S$100 more than the Note 5. The 32GB variant will retail for S$1,188 and the 64GB variant will retail for S$1,288.
The much anticipated OnePlus 2 which was announced last Tuesday, 28th July 2015, will be coming to Singapore in Q4 2015 and the local retail price is S$538 for the 64GB variant.
I played with the OnePlus 2 last Friday, 31st July 2015, at the OnePlus 2 media event in Singapore. I love the build of the OnePlus 2, it feels solid and have a premium touch to it. The phone comes with the Sandstone Black back cover which I totally love. If you don’t like it, you can swap it with four other back covers: Bamboo, Rosewood, Black Apricot, Kevlar, which are sold separately.