What is tha meaning for simcard in Tamil?

There isn't a single, universally accepted Tamil word for "SIM card." However, you can use a few phrases to convey the meaning:

1. சிம் கார்டு (sim kārṭu): This is the most common way to refer to a SIM card, simply using the English word "SIM card" with a Tamil pronunciation.

2. செல்பேசி அடையாள அட்டை (selpēsi aṭaiyāla aṭṭai): This translates to "mobile phone identification card." It accurately describes the function of a SIM card, but might be considered a bit verbose.

3. கைபேசி அடையாள அட்டை (kaipēsi aṭaiyāla aṭṭai): This is similar to the previous phrase but uses "kaipēsi" (mobile phone) instead of "selpēsi".

4. செல்பேசி அடையாளச் சீட்டு (selpēsi aṭaiyāla cīṭṭu): This translates to "mobile phone identification slip/card." It emphasizes the small, card-like nature of a SIM card.

Ultimately, the best choice for you depends on the context and audience.