SIM Movistar is disconnected in the TP Link MR-100 device
I have purchased a TP MR100 device with a Spanish operator SIM (from Movistar, SIM previously unlocked from a mobile phone).
The SIM is recognized initially, but after a few hours (maximum 24 hours), the SIM is no longer available and, therefore, without internet.
If I remove the SIM, restart the device and put the SIM back in, it works again, but it disconnects again after several hours.
I rule out a SIM problem, because I have tested it by sharing data from a mobile phone and the connection remains stable without any interruption.
Can you help me?