+- Comfort Automation/ Security System Forums (https://www.comfortforums.com)
+-- Forum: Products (https://www.comfortforums.com/forum-3.html)
+--- Forum: GSM Module (https://www.comfortforums.com/forum-48.html)
+--- Thread: GSM 4 (/thread-4367.html)
- juwi_uk - 12-20-2015
What size SIM card fits in the UCM; Standard, Micro, Nano?
- tech07 - 12-20-2015
Standard
SIM card must not be 3G or 4g data only
It should be able to send sms
- juwi_uk - 12-20-2015
Cool. Maybe you can add this to the manual too as I couldn\'t see it in the version I have.
- slychiu - 12-21-2015
we will add it
This was written in the days when there was only one size of SIM card, before Apple made it so complicated
- slychiu - 12-21-2015
A note about SIM cards has also been added in http://www.comfortforums.com/forum48/3647.html
- slychiu - 12-21-2015
Regarding SIM sizes, the \"Mini-sim\" (25 x 15mm) as shown below is used for UCM/GSM. Sometimes this is referred to as a \"standard-size\" SIM. Not the \"Full Size\" SIM shown below
- juwi_uk - 12-21-2015
Apart from needing to accommodate a standard SIM slot im curious BTW why the main GSM module is so big given what is crammed into a phone theae days. Would a GSM 5 be able to be made at a fraction of the size and cost i wonder?
- slychiu - 12-21-2015
Thats an interesting question, Julian
Does anyone else know the answer?
- slychiu - 01-02-2016
Quote:Apart from needing to accommodate a standard SIM slot im curious BTW why the main GSM module is so big given what is crammed into a phone these days. Would a GSM 5 be able to be made at a fraction of the size and cost, i wonder?
My answer is that reducing the size does not necessarily reduce the cost of a device, unless there is very large volume as in the case with phones. Modern phones must be thin and light, since they have to fit in a shirt pocket, but a UCM/GSM does not need to be small and thin so there is little to be gained from reducing the size. A micro or nano sim holder could be used in place of the standard size SIM holder, but that consideration is based on the ease of handling a standard size SIM vs micro or nano sims and inserting it into the holder.