I read here:
that mkrgsm has "LiPo battery charging capability"
But I couldn't find any information about it in arduino page.
Could anyone confirm that is possible to recharge the LiPo through MKRGSM?
Or is it needed an external charger?
Read the MKR1000 page as there is better info there.
Almost the same circuit but I believe the MKR GSM needs a higher capacity battery 1500 mAh minimum.