Mobile Phone External Memory Card

Write them on the outside of the "external memory card." Seriously, record (write)them on a piece of paper and put them in a secure place. Save them on your PC. Memorize them.

"I use Alfatel H2 mobile phone." I thought Alf was canceled.

I am unfamiliar with your phone but memory cards are fairly standard so buy a flash drive size single card adapter and store information as a text file. You may be able to use back up and restore from your internal memory to the external card - I had a couple of units that would do that. Also you could send yourself a text message or an email with an attachment and just save it in your phone. There are probably other methods, too.

Many phones nowadays have a micro SD card alongside your phone`s sim chip. Open the battery cover, take out the battery and see if this is the case. If so, purchase an adapter for the micro SD and save it where ever you want.

If not, does your phone have bluetooth conectivity? If so, send all your contacts via bluetooth to an outside memory.

Since this is a GSM phone, I had to go ask my friend, Mr. Google, about that. He said there are a number of sites where you can download applications to store your contacts externally or synchronize them with a PC. One of them was

http://www.filebuzz.com/findsoftware/Free_Alfatel_H2_Chinese_Mobile_Phone_Ebook/1.html

Unfortunately, not all productivity apps are free.

Since this is a GSM phone, your numbers are stored on a memory card already -- the SIM chip. If you want back up of your numbers in case the phone is lost or destroyed, then do what lynlynch said to do in the first response to this thread. That is the best suggestion.