Students are going to change it for the elderly. They turned over a Sony Ericsson w995 from home, and then inserted a sim card. They can make phone calls, but they can't send and receive text messages

Students are going to change it for the elderly. They turned over a Sony Ericsson w995 from home, and then inserted a sim card. They can make phone calls, but they can't send and receive text messages. Sony Ericsson W955 is an old-fashioned slide phone with several different versions. If you can't send and receive SMS, please check whether the service number of SMS center is set in SMS settings. China Mobile and China Unicom's SMS center have different service numbers, so they can't be used if they are set incorrectly. The specific figures vary from place to place. Taking Beijing Mobile as an example, +86 1380 0 100 500, +86 is the country code, 1380 is the starting number of China Mobile access, and 0 100 is the 4-digit area code with 3 digits. The last three digits of 500 are national fixed codes. Unicom's access number is 130 10, followed by the area code, which is a region-specific number. Ask the local Unicom company specifically. The automatic positioning setting of the new smart phone does not need to be set.