too Hello. I have a 4G SIM card in my DUDU7 for mobile data. It's a great head unit! After starting and stopping the engine several times over the course of a few days (it goes into sleep mode), the SIM card shows no SIM and I can't use mobile data until I restart the head unit. Any ideas?
Chrisdudu too Same issue here. Works great, but once every few days it doesn’t see the simcard and needs a reboot.
DUDU-Meng Chrisdudu at_cleric too Hello everyone, this is a system optimization for some SIM card issues after waking from sleep mode. Please upgrade to see if it can solve some SIM card issues. Thank you. https://drive.google.com/open?id=1sQfGxx5CTuhaBfeg0e-wpSIY8XkkjaAJ&usp=drive_fs
DUDU-Meng After waking from sleep mode, is there no SIM card, or is there a SIM card but no signal? If there is no SIM card, try reinserting the card or placing a piece of paper under the card to press it more firmly.
too DUDU-Meng I don't think it's a contact problem. It happens sporadically in the parking lot at home where there is plenty of signal.
at_cleric When the SIM card is on and Wi-Fi is turned on, the SIM card is not detected when coming out of "Sleep". The error is unstable. But when Wi-Fi is turned off, there is no such error, I have not observed it.
DUDU-Meng Chrisdudu Thank you for testing. Extract the 7Z file to a USB flash drive. The USB flash drive will be automatically recognized when inserted.
Chrisdudu DUDU-Meng I’ll try to find a place with WiFi. Can I download it on the radio, put it on a USB stick via the car and then install it? I don’t have a laptop the next few days. Also, does it reset all the settings?
DUDU-Meng Chrisdudu It will not reset the settings, but you need to extract the 7Z compressed file to a USB flash drive or internal storage so that it can automatically detect the upgrade.
DUDU-Meng Chrisdudu You cannot use this method. Here, you need to verify the MD5 of the official version. Unzip all files to the internal storage or to a USB flash drive, and they will be automatically upgraded.
Chrisdudu DUDU-Meng I finally got it to install, I will get back to you if the issue is resolved. I give it a few days and report back after the weekend.
