Seek eSIM Physical Card (S0 Version) Frequently Asked Questions and Answers

**Chip Source and Certificates**: The chip used in this card is not an imported ST33 type chip, but rather a domestic low-capacity chip. It is pre-installed with the GSMA international certificate, which enables it to support the writing of various eSIM data plans that comply with this certification standard worldwide.

The capacity of this card is 100KB, which is a small-capacity eSIM chip card. It is sufficient to meet the needs of most common scenarios, such as traveling abroad, business trips, and cross-border e-commerce, where the capacity requirements are not high. In addition, we will successively launch cards using imported chips, such as the S1 (400KB), S2 (1MB), and S3 (2MB) versions. These will be sold on various platforms simultaneously. Please stay tuned. Once we have relevant updates, we will notify you immediately.

Under normal usage conditions, that is, avoiding pressing or bending the card, this card will not have stability issues on the hardware side. Before leaving the factory, our cards have undergone rigorous read and write tests of more than 100,000 cycles to ensure they can be safely and stably delivered to customers. Therefore, theoretically, this card supports unlimited rewrites (up to 100,000 times).

After using this card to write the eSIM data plan, there may be instances of network interruption or poor signal during use. However, this mainly depends on the stability of the base station service that the eSIM data plan relies on, and has little to do with the hardware card itself. As long as the eSIM can be successfully written to the card, it is equivalent to a regular SIM card. Just like the SIM cards we use in our daily lives, when the mobile signal in your location is good, the network signal will be good; otherwise, it will be poor.

**eSIM Write Capacity**: The number of eSIMs that can be installed depends on the size of the eSIM profile. Generally, it is possible to install 1 to 3 eSIMs. For relatively smaller eSIMs like the official SeekEsim, the number of installable eSIMs can reach up to 7.

**Phone Number Write Situation**: Phone numbers are bound to the eSIM. If your eSIM contains a phone number, then that number can be written; if it does not contain a phone number, then it cannot be written. This is not related to the hardware card, but is determined by the eSIM data plan.

Due to the special configuration of T-Mobile's eSIM data plans, this card currently does not support writing T-Mobile eSIMs from the United States. However, the subsequent versions, such as S1, S2, S3, and other series of cards, will all support writing T-Mobile eSIMs. Please choose to purchase according to your specific usage scenario.

**Android Phones**: This card supports direct writing of eSIM data via Android phone apps.

**Apple Phone Usage Limitations**: Apple phones (iOS system) can only use this card but cannot directly write eSIM data. A smart card reader is needed to complete the writing process on a computer before transferring the card to an Apple phone for use. Alternatively, you can first write the eSIM data using an Android phone and then transfer the card to an Apple phone for use.

**Switching and STK Menu on Apple Phones**: This card currently does not support switching between eSIMs on Apple phones and does not offer STK menu functionality.

**Apple Phone Switching and STK Menu**: The current version of this card does not support switching between eSIMs on Apple phones, nor does it support the STK menu function. However, the subsequent versions, such as S1 and S2, will support these features.

This card does not support writing eSIMs from the three major domestic (Mainland China) carriers. If you need to use a domestic (Mainland China) eSIM, it is recommended to visit a physical service center for manual verification and processing.

Compared with other cards on the market such as 5ber and 9esim, their basic functions are similar. The main differences lie in its slightly smaller capacity and a greater focus on cost-effectiveness, making it suitable for general use scenarios.

This card supports writing and managing eSIMs using the open-source software EasyEUICC APP. In fact, any APP that belongs to the EasyEUICC category (such as SeekEuicc APP) can be used for the operation and management of this card. However, different APPs correspond to different ARA-M values. As long as you provide us with the ARA-M value of the APP you intend to use, we can preset it for you for your convenience. But it should be noted that once the ARA-M value has been customized for a card, it cannot be returned unless there is a quality issue.

This card can only write eSIM data plans and cannot write data from regular SIM cards. It is designed specifically as a chip card for converting eSIM to physical SIM and only supports eSIM writing. Writing data from a physical SIM requires visiting a service center in your area for real-name authentication processing.

Locked iPhones can also be installed and used. So-called locked iPhones are contract models launched by foreign carriers. Their hardware configuration is exactly the same as that of unlocked phones, but they are bound to a specific carrier network and can only use SIM cards from that network. The main difference between locked and unlocked phones lies in the restriction on network usage. To use services from other carriers, one would need to unlock the phone through technical means. Because of this, locked iPhones cannot directly install eSIM data plans from non-bound carriers. However, by using the card trick technology in conjunction with the SeekEsim physical card, the use of eSIM can be achieved. Compared with ordinary unlocked phones, locked iPhones require an additional card trick when in use.