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QUALIFIED TRUST SERVICES

Legally compliant digital signatures (eIDAS) to drive forward the digitalization of your business processes.

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CORPORATE TRUST SERVICES

Cryptography-based trust services
to protect your digital identities,
data and business secrets.

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Qualified electronic signature products based on eIDAS - legally binding and secure.

INDIVIDUAL
ENTERPRISE
OEM
PRODUCTS

Easy-to-use, legally secure and flexible. Simple as that.

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API GUIDE

Upgrade your application with electronic signatures by primesign.





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DOCUMENT SIGNING API

Signing of PDF documents. primesign handles document processing and adds a visual signature stamp.

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HASH SIGNING API

Signing of hash values. Your application handles document processing and provides the document viewer.

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CASH BOX API

RKSV-compliant JWS- or raw signatures for cash box receipts.





DOCUMENTATION
primesign TRUST CENTER

All documents for our qualified trust services, certificate revocation list, root-/CA- certificates, etc.

TRUST CENTER
RESOURCES

Fact sheets, product documentation and more.



RESOURCES

Huawei E352 Proshivka Skachat Apr 2026

: Click "Start" and wait for the progress bar to finish. Do not unplug the modem or shut down your PC during this time. Updating the Dashboard

: Download the necessary ZIP or RAR files and use a tool like WinRAR to extract the contents. Prepare the Device : Connect the Go to product viewer dialog for this item. modem to your computer's USB port. huawei e352 proshivka skachat

The is a 3G USB modem dongle released around 2011, and while official support from Huawei has largely ended, firmware (proshivka) and dashboard updates are still available through third-party archives and specialized unlocker sites. Where to Download (Skachat) : Click "Start" and wait for the progress bar to finish

: Provides a consolidated list of firmware links for the E352 and related models, often tailored to specific mobile operators. Installation Steps (Manual Update) Prepare the Device : Connect the Go to

: This site hosts specific firmware versions such as 21.157.31.00.864.B734 and 22.158.47.00.00 . Note that accessing the support area may require using their client software.