Maps v3.06 and later allow the downloading of map data directly to the device via Wi-Fi (WLAN) connection. No PC is needed in this case for transferring the map data.
Map data can be downloaded via Wi-Fi connection in the following way:
After the map data has been downloaded, the maps on your phone are shown on the Update or Map loader page. You can check with Check for updates command if there's any updates available for your map data.
Many features in your Nokia Lumia phone increase the demand on battery power and reduce the battery life time. For example if the signal strength of the mobile network varies much in your area, your phone must scan for the available network repeatedly. This increases the demand on battery power.
You can set your phone to automatically save power when the battery charge level is low. To check the battery status, and switch battery saver mode on, go to Settings > battery saver. Windows Phone 8: To choose when you want battery saver mode to be activated, switch Battery saver toggle to On and tap advanced.
Note: When Battery Saver is on, your phone will no longer: automatically receive email and calendar updates, update some Live Tiles and allow apps to run in the background.
If you are listening to music or otherwise using your phone, but do not want to make or receive calls, switch airplane (flight) mode on under the Settings menu.
To save battery power, note the following:
Background apps
The screen
Use network connections selectively
Anything else I need to know?
The instructions to save power on your Lumia phone presented on this video (English) from Nokia Care.
If the battery drains faster even there is no active feature or applications, try to switch off the power and then switch back on. The battery may also be worn out and needs to be replacing with a new one.
The previous actions usually solve your problem. If it does not help, insert your SIM card in another device and retry. If it is working in another device, contact your network operator for Internet and MMS settings reconfiguration or you may need reset the phone to factory settings (Settings > about > reset your phone).
Use the following guidelines to increase your battery life time:
Make sure your phone is running the latest software. For downloads and assistance, go to your local Nokia website's support page.
If the battery loses the power fast even though there is no features consuming the power, the battery may be wearing out and you need to replace it with a new one.