Before a repair, you should clarify which functional tests are planned and how your personal data will be protected. Whether an unlocked device is required for this depends on the model, the damage, and the test. Do not pass on access credentials without careful consideration.
Which tests require device access?
After a part replacement, tests of the touchscreen, camera, or audio, for example, may be sensible. Not every function can be tested on a locked device. Before commissioning the work, discuss which tests are possible without access and whether you can unlock the device yourself for a required test.
An unfeasible test constitutes a limitation of the testing scope. One should not derive a blanket statement from this that all warranty or guarantee claims are void. Clarify the specific procedure and the applicable conditions in advance.
Backup and personal data
Back up your data before handing over the device, provided it can be operated safely. Even with a hardware repair, technical data loss cannot be completely ruled out. In the event of moisture, overheating, a swollen battery, or broken glass, safe handling takes priority over a new backup attempt.
Do not share Apple, Google, or other account passwords, or any two-factor codes. If a reset is being considered, clarify data backup, account access, and device management first. Do not reset a school or company device without approval from the responsible department.
Samsung: Check Maintenance Mode
Supported Galaxy devices offer a Maintenance Mode that shields personal content during repair. Availability depends on the device and software. Use Samsung's guide to Maintenance Mode and coordinate whether it is suitable for the intended tests. A backup remains sensible.
Google Pixel: Repair Mode instead of blanket guest mode recommendation
For supported Pixel devices, there is a dedicated Repair Mode. It enables an environment intended for repairs to protect personal content. Check the requirements and preparation in the official Pixel guide. Which tests are possible with this and whether further steps are necessary depends on the defect.
Preparing iPhone and iPad
Apple recommends not sharing the device passcode and account password with third parties. If you enter something yourself for necessary support, remain present during device access. Preparation differs according to software version; therefore, use the current service guide from Apple. These manufacturer instructions are not a statement regarding authorization by STARPHONE.
Other manufacturers and managed devices
An additional user area is not automatically suitable for all repair tests. Check the manufacturer's guide for your model and clarify the procedure with the repair shop. For school and company devices, the responsible IT department should be involved in this coordination.
Ask before the repair
Have your model and error description ready. You can request the scope of testing under Contact. Mobile phone repair in Aachen, tablet repair, and notebook repair lead to the appropriate service.