Nokia 6670 User Guide 119 Copyright © 2005 NokiaTroubleshooting15 Troubleshooting• SIM CARDA SIM (subscriber identity module) card is required for your Nokia GSM phone tooperate. The SIM card is supplied by your service provider and has your mobilephone number and all subscriber account information programmed on it.You can save contact information from your contacts list on the SIM card sothat when you use the SIM card in another GSM phone or terminal, your phonenumber and contacts will be available to you on the SIM card rather than storedin phone memory. Note that you can only save names and phone numbers onthe SIM card.The SIM card in the Nokia 6670 phone is located under the battery in the topleft corner. The SIM card must be inserted under the hood and the gold-coloredcontacts on the card must make direct contact with the gold-colored contactsin the card slot. See “Insert the SIM card” on page 16.• MEMORY LOWWhen one of the following notes is shown, the phone memory is low and youmust delete some data:• Not enough memory to perform operation.• Delete some data first.• Memory low. Delete some data.To view what kind of data you have and how much memory the different datagroups consume, select Menu > Tools > File mngr. > Options > Memory details.You may want to delete the following items regularly to avoid memory getting low:• Messages from the Inbox, Drafts, and Sent folders in Messaging.• Retrieved e-mail messages from the phone memory.• Saved browser pages.• Images, video clips, and sound clips in Gallery.If you want to delete contact information, calendar notes, call timers, call costtimers, game scores, or any other data, go to the respective application to removethe data.If you are deleting multiple items and one of the low memory notes is shownagain, try deleting items one by one (starting from the smallest item).