user48730: I've bought such on Amazon. My main problem is that it stays in 1sec-blink, meaning it can't registrer cellular network.
First I tried with all anntennas possiblities (one of each, both, none) - failed.
Using NodeMCU (for 3.3 TxRx) and SoftwareSerial.h to communicate. It answers all AT command as expected.
I tried several powering possibilities (as noted extensively about 2A on the internet), including 18650 , 2000mAh battery connected only to SIM800L module with no MCU connected, still same state.
What Can be done else?
SEE PELEPHONE:


user4143: Your mobile network provider does not provide a 2G (GPRS / GSM) network.
2G is graduallly being phased out around the globe, so switching to an LTE modem is really the way forward.
If you still want to use the SIM800L then you need a network provider that gives 2G services. Fortunately the SIM800L is a "quad band" modem, so it will work with pretty much any 2G provider (it works on 850/900/1800/1900MHz, hence the "quad" of "quad band").

48730: <p>I've bought such on Amazon. My main problem is that it stays in 1sec-blink, meaning it can't registrer cellular network.</p>
<p>First I tried with all anntennas possiblities (one of each, both, none) - failed.</p>
<p>Using NodeMCU (for 3.3 TxRx) and <code>SoftwareSerial.h</code> to communicate. It answers all AT command as expected.</p>
<p>I tried several powering possibilities (as noted extensively about 2A on the internet), including 18650 , 2000mAh battery connected only to SIM800L module with no MCU connected, still same state.</p>
<p>What Can be done else?</p>
<p>SEE PELEPHONE:
<a href="https://i.stack.imgur.com/mWCzC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mWCzC.png" alt="Carrier support - &quot;PELEPHONE&quot;" /></a></p>
 4143: <p>Your mobile network provider does not provide a 2G (GPRS / GSM) network.</p>
<p>2G is graduallly being phased out around the globe, so switching to an LTE modem is really the way forward.</p>
<p>If you still want to use the SIM800L then you need a network provider that gives 2G services. Fortunately the SIM800L is a &quot;quad band&quot; modem, so it will work with pretty much any 2G provider (it works on 850/900/1800/1900MHz, hence the &quot;quad&quot; of &quot;quad band&quot;).</p>
