If you're changing SIM cards on your mobile phone, your photos, voicemail, videos, texts, call history, contacts, and other data will not be affected.

An SD card is what stores abs saves data within a mobile phone. Your SD Card is a different optional storage card that is not required for any phone to operate on Tesix's network.

Activating a new SIM card won't impact any data stored on an SD card, but as some phones share the same "tray" for SIM and SD cards, be careful not to remove the SD card when installing or changing the SIM card.