This week Microsoft has announced yet another addition to its Lumia range of smartphones. Here's what you need to know about the Lumia 540 release date, price and specs. Also see: Best Windows Phones 2015 and Best smartphones 2015.

If we're getting confused by the ever increasing amount of Lumias to choose from then you probably are. The '5' of this Lumia means it’s a budget Windows Phone and the '40' part means it's a newer model than the Lumia 520 or 530.

The Lumia 640 has just launched with the first number signifying that it has a better spec and is therefore more expensive.

"The Lumia team is passionate about product-making, creating every smartphone with a distinct design personality within a coherent design approach," said Iain Pottie, senior design manager of industrial design and mechanics at Microsoft.

"Our customers are the source of so much inspiration, but we know they have different needs and budgets, so we always want to provide choice. That’s why today we’re introducing the new Lumia 540 Dual SIM."

Microsoft Lumia 540 Dual SIM release date and price

The firm has said the Lumia 540 Dual SIM will being rolling out in May and will initially launch in IMEA (India, Middle East and Africa) and APAC (Asia Pacific). This means won't arrive in the UK for the time being, with the Lumia 535 similar although slightly lower in spec.

Microsoft has also confirmed it will be prices at $149 USD without taxes and subsidies.

Lumia 540 specs

Lumia 540 Dual SIM specs

Operating system

Windows Phone 8.1 with Lumia Denim

Display

5-inch HD (1280 x 720, 16:9), 294 ppi

Battery

2200 mAh, removable

Processor

1.2 GHz quad-core Qualcomm Snapdragon 200 processor

Main camera

8Mp auto focus, LED flash

Front-facing camera

5Mp wide-angle

Memory

1GB RAM
8GB onboard storage
15GB OneDrive cloud storage
microSD up to 128 GB

Dimensions

144 x 73.69 x 9.35 mm
152g