Battery Recall & Stored Contacts Info

Question

I am new to cell phones. I have had my first one
for several months, a Nokia model 1112.
The just-announced battery recall for the 1112 and
many other Nokia models brings up some questions:
1) Is there any reason why I would want to have the
info for my Contacts stored either: on the phone or on
the SIMS card? (The two options given to me by my phone.)
2) Is there some reason why I get a message stating:
Selected Memory Empty -- no matter whether I try to
change the Contacts from the Phone to the SIMS card or
vice-versa (from the SIMS card to the Phone)?
3) Will removing the battery to get the ID number from
it in order to put the number into the Battery Recall form
on the Nokia website result in my Contacts info being lost?
4) And finally, Nokia says only some batteries have
the overheating problem. Does anyone know anything
about this aspect of the recall?
Thanks a lot, Sunny

Answer 1

1: The SIM card can only hold simple name-number pairs, and fewer contact records in total (usually 250 with today's SIM cards, I think). In phone memory you can have more contacts, and with more complex structure (postal addresses, business addresses, multiple numbers, web and email addresses, etc.).
2: I don't know. One or the other is presumably empty, or the phone has a software glitch if it thinks so incorrectly.
3: No. Contacts on SIM or in phone memory are stored in non-volatile storage (and an empty or removed battery will not have an effect).
4: All that's announces is on the website:
http://www.nokia.com/batteryreplacement/en/