Telstra has announced pricing details and opened online pre-orders for Samsung's new Galaxy S4 Mini smartphone.

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The telco revealed today that the Galaxy S4 Mini will be available to purchase in-store and online from Tuesday, 17 September.

The Galaxy S4 Mini will be sold on four Telstra plans, all over 24 months. The hero plan appears to be a $4 monthly handset repayment on Telstra's $60 plan, which includes $600 worth of calls and MMS messages, unlimited SMS messages, and 1GB of data per month.

The Galaxy S4 is also available with no additional handset repayments on Telstra's $80, $100, and $130 plans.

Telstra says customers who pre-order the Galaxy S4 Mini online before Tuesday, 17 September will receive a free Fitbit Flex activity tracker, valued at $119.95.

The 4G-capable Galaxy S4 Mini is basically a smaller, cut down version of Samsung's original Galaxy S4. The device is 12mm shorter and over 8mm less in width and is targeted directly at users who might find the Galaxy S4 and other flagship smartphones too large.

The phone has a 4.3in screen with a qHD resolution of 540x960 compared to the full HD resolution of its larger model, while its camera has also been downgraded from 13-megapixels to 8-megapixels.

The Galaxy S4 Mini is powered by a 1.7GHz dual-core Qualcomm Snapdragon 400 processor, has 1.5GB of RAM and comes with 8GB of internal memory, while a microSD card slot allows for memory expansion.