Dual SIM Card Tray Interchange between iPhone 12Pro Max & iPhone15Pro Max.

No, service will not be denied because of swapping SIM cards. If a cellular issue arises, you may be required to switch trays back to diagnose the issue. Remote diagnostics will not detect the swap. Some models have numbers engraved. In your case the color mismatch is a give away. I’m a former Apple Store manager and have seen swapped SIM cards before. It’s not that big a deal.

Swapping the SIM tray between an iPhone 12 Pro Max and an iPhone 15 Pro Max may raise several questions and concerns. While the trays might fit snugly and appear to work, there are critical reasons to proceed cautiously:

1. Device Compatibility: Although the SIM trays of different iPhone models may look similar, they are designed specifically for their respective models. Variations in materials, size tolerances, or design features could impact performance, leading to issues such as poor connectivity or improper alignment.
2. Hardware Access: Even if the SIM tray fits physically, how can you be sure it properly connects to and allows the phone’s internal hardware to access the SIM card? Apple designs each SIM tray to match the specific alignment and hardware layout of its corresponding iPhone model. Using a tray from another model may result in partial or no contact with the SIM card, potentially leading to errors or intermittent issues.
3. Warranty and Support Risks: Altering hardware components, especially with parts not originally intended for the device, could potentially void the warranty. If the modification is detected during a service request, Apple may refuse to provide warranty coverage, as such actions are generally against their repair policies.
4. Experimentation Concerns: Experimenting with high-end devices like iPhones should be approached cautiously. The potential costs of damaging internal components or encountering software issues due to hardware mismatches far outweigh the benefits of testing compatibility.
5. Security and Device Integrity: Apple’s engineering ensures that all hardware components, including SIM trays, meet strict standards for durability and security. Using a tray from another model could inadvertently compromise the device’s physical integrity or its ability to securely hold the SIM card, leading to operational issues.
6. Alternatives and Precautions: If you are facing issues with the original SIM tray, replacing it with a genuine, model-specific tray from Apple or an authorized service provider is the safest approach. This ensures compatibility and preserves warranty coverage.