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B2B · Pre-owned Apple devices · A Sunstrike group company

Giving every device
a second life

Dependable supply · Clear grading · Pre-owned iPhone for business buyers.

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About Siersz

Siersz supplies pre-owned Apple devices, mainly iPhone, to business customers. We work with carriers, retailers, e-commerce platforms and distributors that need consistent supply and transparent grading.

Siersz is a sister company of the Sunstrike group. We draw on the group's worldwide supply network and serve Chinese-speaking business buyers in their own language.

[Add Siersz's own details: year founded, business model, who you serve]

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Device range

Multiple models, capacities and colours. Contact us to confirm current stock. [List your main models and grades here]

What we do

Wholesale supply

Bulk pre-owned iPhone supply for business buyers, with clear model, capacity, grade and quantity.

Grading and inspection

A consistent grading standard, with each device tested and recorded before shipment.

Logistics and delivery

Shipping arranged per order, with order progress you can follow.

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How we work

  1. 1

    Source

    Devices come in through the group network.

  2. 2

    Test and grade

    Each unit tested, data-erased and graded.

  3. 3

    Ship

    Dispatched per order, with progress shared.

  4. 4

    Support

    Feedback and ongoing cooperation. [Add warranty if any]

Who we serve

  • Mobile network operators
  • Retailers and retail chains
  • E-commerce platforms
  • Distributors and wholesalers
  • Insurers and device-replacement providers
  • Enterprise and public-sector buyers

[Add or remove customer types to match reality]

Group strength: Sunstrike

These figures describe the Sunstrike International group as a whole. Siersz operates on the strength of this network.

1997group founded
85countries served
2,500+global partners
1M+devices handled per year

[Confirm these figures with the group before launch and keep them consistent]

Global network

The group operates across five continents. Main hubs include:

MiamiNorth America
LondonEurope
DubaiMiddle East
Hong Kong · IndiaAsia

[Confirm which hubs may be shown publicly and which ones Siersz can actually use]

Every device checked, every grade clear

Each device is inspected and graded before it ships, so buyers know exactly what they receive.

  • Cosmetic and screen check
  • Battery and function tests
  • Data erasure and records
  • One consistent grading scale

[Edit these points to match your real process]

Become a partner

Tell us what you need and the scale of your business, and we will prepare a suitable proposal.

Open a trade account