it work !,
in fact i was not use the network-manager ,but use the ppp package with "SIM7070_SIM7080_SIM7090 Series_Linux_Application Note_V1.02.pdf" exemple for the script .
7070G is slow , but for IOT it's perfect
Yes the new Sunvell 2G+16G is named "Sunvell H3" on Gearbest :
https://fr.gearbest.com/tv-box/pp_009806580615.html?wid=1433363
But i have Build "the Sunvell R69" version for test it on SD (with the Xenial for full Hardware acceleration on GPU)
I see on RS232 on normal boot (from nand and android) , the board boot with Uboot too . so i don't think it's a probleme for boot in Nand:
"U-Boot 2014.07 (Jul 24 2018 - 15:09:49) Allwinner Technology"
"[0.895]NAND: NAND_UbootInit
NAND_UbootInit start
NB1 : enter NAND_LogicInit"
Thierry Rivier got a reaction from Werner in Support for SIMCom SIM7070G-based modems please
Thierry Rivier got a reaction from gounthar in Sunvell H3 2GB RAM + 16GB ROM TV Box