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I would like to state that I am not familiar with the whole cellular connection thing. But I was wondering if the SIM900/or/SIM900A is 3G and will work with PTel Mobile.

I need this Arduino to be able to travel and needs to connect to every PTel's tower. Will I be able to connect to 3G or only the 2G and the 1G networks?

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  • Do you need 3G, or do you just need Data? Arduinos don't run fast enough to even saturate 2G. – Jake C Jul 25 '15 at 6:11
  • It's GPRS only (GPRS class 10: max. 85.6 kbps) according to the datasheet – Gerben Jul 25 '15 at 8:37
  • I don't have enough reputation to post a comment, but this is a comment for both your answers, TP Ap and Ralph. What is the source for your answers? I'm trying to find out the answer to this question myself and I've seen a lot of claims like yours which aren't backed up by sources. I haven't found a single source which confirms this one way or another. I read the datasheet for the chip and couldn't find the answer there either. – Bill Mahoney Mar 31 '19 at 16:50
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First of all if you are in USA you cannot use SIM 900A since it supports only Dual frequency bands.(900,1800 MHz)it supports only Asian region countries.

According to Wikipedia, PTel Mobile supports only GSM 850/1900 frequencies. so SIM 900 supports( 850,900,1800,1900 MHz ) you must use SIM900

Considering about the speed you cannot obtain 3g, 4g speed since GSM Shield(SIM900) provides maximum of GPRS class 10: max. 85.6 kbps (downlink) so,

It will able to connect but cannot get such speed in 3g and 4g.

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It will not be able to connect to a 3G or 4G network. There has to be a 2G network / support and that support is getting less.

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