"You should not touch the SIM card settings on the phone. If you act carelessly, it will not be possible to return the phone to factory settings without the help of a specialist.
According to Gadin.Net, Olga Timofeyeva, Chief Operating Officer of the Russian company Gamesup42, warned about this, according to Prime.
He also said that if the settings are changed, access to the Internet or mobile communication may be lost:
"You have to be very careful with subscriptions or paid services. If these services are included in the SIM-card menu by the operator, do not try to cancel them.
Olga Timofeyeva advised not to use the "designer mode" in order to change the work of the gadget independently. According to the expert, this section is needed for the installation of smartphones in production. Any changes there may cause malfunctions or damage to the phone.
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