Security and data managementManage the data and software on your device, and takecare of the security of the device and its contents.Important: Your device can only support oneantivirus application. Having more than oneapplication with antivirus functionality could affectperformance and operation or cause the device to stopfunctioning.Lock the deviceTo prevent access to the contents of your device, lockthe device when in home screen. Press the power key,select Lock phone, and enter your lock code. Thedefault lock code is 12345. To unlock, press the leftselection key, enter your lock code, and press the scrollkey.To change the lock code, select Menu > Tools >Settings > General > Security > Phone and SIMcard > Lock code. Enter the old code and then thenew code twice. The new code can be 4-255 characterslong. Both alphabets and digits can be used, and bothuppercase and lowercase alphabets are possible.You can also lock the device remotely by sending a textmessage to the device. To enable remote locking andto define the text for the message, select Menu >Tools > Settings > General > Security > Phoneand SIM card > Allow remote lock > Yes. Enter theremote lock message and confirm the message. Themessage must be at least 5 characters long.MemoryThere are two types of memory into which you can savedata or install applications: device memory andmemory card.Free memoryTo see how much memory is currently in use, howmuch free memory remains, and how much memory isconsumed by each data type, select Menu >Options > Memory details > Phone memory orMemory card.Tip: To ensure that you have adequate memory,transfer data regularly to a memory card orcomputer, or use File manager to delete files youno longer need.After you install applications to a compatible memorycard, installation files (.sis, .sisx) remain in the devicememory. The files may use large amounts of memoryand prevent you from storing other files. To maintainsufficient memory, use Nokia PC Suite to back upinstallation files to a compatible PC, then use the filemanager to remove the installation files from thedevice memory. If the .sis file is a message attachment,delete the message from the Messaging inbox.105 Security and data management