2013 India sketch Journal Page 10 by Meera Rao
Staying in India for months means I had to get a cell phone number. They are pretty strict about cell phones since the tragedy in Mumbai Taj Hotel. After gathering up and submitting all the required documents, I acquired a new sim card and a new number. I was really excited to open the cell phone, replace the sim card and activate the phone for India. I sketched the phone, and the simcard (tracing around the actual older card that I took out) while I had it open. Then I went googling for information about 'sim' cards.
2013 India sketch Journal June 25 by Meera Rao
Wikipedia gave me the following information: A subscriber identity module or subscriber identification module (SIM) is an integrated circuit that securely stores the international mobile subscriber identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).
A SIM circuit is embedded into a removable plastic card. This plastic card is called a "SIM card" and can be transferred between different mobile devices. A SIM card follows certain smart card standards. SIM cards were first made the same size as a credit card (85.60 mm × 53.98 mm × 0.76 mm). The development of physically smaller mobile devices prompted the development of a smaller SIM card, the mini-SIM card. Mini-SIM cards have the same thickness as full-size cards, but their length and width are reduced to 25 mm × 15 mm.
A SIM card contains its unique serial number (ICCID), international mobile subscriber identity (IMSI), security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to and two passwords: a personal identification number (PIN) for ordinary use and a personal unblocking code (PUK) for PIN unlocking.
You may read more fascinating stuff about SIM cards, its history, design, formats etc here.
2013 India sketch Journal June25 by Meera Rao
Regarding "call or write", I guess for me now its partly 'sketch' - how about you?