DUDU-Meng But thats what i'm saying..I have network, I have a 4g sim card, its active as soon as the unit boots up, its 100% online when igo boots. However I know more about igo than dudu and my previous unit a topway with PIP had no sim card so no network until wifi turned on and igo always booted up fine.
I use Igo nextgen primo palestine and it differs from most navigation programs as you don't simply install an app and download offline maps or use maps online. For a fully functional igo nextgen you must build a folder called iGO_Pal, this contains all UI files, a data.zip, and a sys.txt this folder also must have a content subfolder to contain maps, poi files, language and voice, you then place your igo apk file in the main iGO_Pal folder. This igo folder must then be placed on the dudu7 or phones internal storage, not an sd card and not in Android - Data as most do. Once the folder is copied to internal storage you then install the igo apk from within the igo folder. Open the app from the app list, as far as I know it only needs network during this initial setup as it saves all setup data to its save folder and writes to sys.txt so once this is done it does not need network to run and function, only for online services such as traffic, its designed to be fully functional for navigation offline if needed.
iGO_Pal folder structure

Content subfolder for maps, voices, poi, 3d buildings, 3d terrain(dem) etc

Copy folder to android unit/phone internal storage

Now install apk from inside iGO_Pal folder on unit/phone main storage, once installed tap done, not open and open from apps screen

Video of install here https://drive.google.com/file/d/1Y8H4eDWDSE2CujJLFlHxn6twg4aG1sMi/view?usp=sharing
Please note my post above where I state that sygic and waze are now doing the same thing, and please accept the absolute cold hard fact that this error did not occur in OS 3.5 or any of the 3.6 betas. I accept that you know your dudu7 OS please accept the fact I know 100% my igo build works. This exact same build and apk has been copied onto my android 14 phone and works, copied onto my android 9 tablet and works, copied onto an android 10 TS18 Eonon head unit and works in PIP with no network.
Friends I do not wish to argumentative or awkward but this error is most definitely a bug in the duduOS that was not present in OS 3.5 or 3.6 betas, I am even more convinced now because 2 more navigation programs are giving the same error in PIP, DUDU is a new software, its a great great software but it has bugs, but thats to be expected, but I am respectfully asking you to look into the PIP part of the software