The “SIM 1 Not Allowed” error can be caused by an incompatible SIM card or blocked IMEI. For some people, troubleshooting can help solve the problem.
A common problem when first setting up a smartphone, such as a Samsung Galaxy device, is the “SIM Not Allowed” error. While SIM card errors on older phones can be an inevitable problem, modern problems with these errors are easily remedied with some simple troubleshooting. The major phone companies are stopping support for 3G networks, making mobile data useless for older devices. While this can affect older Android phones and devices like Kindle, modern Samsung phones can experience SIM errors due to setup issues.
However, the inconvenience caused by the paired SIM may not bother the user for long. eSIM technology, which allows users to connect to cellular services without inserting a physical SIM card, is common on modern smartphones. Furthermore, eSIM may even be replaced by a newer technology in the future, as companies are currently experimenting with iSIM technology. This is a smaller version of an eSIM chip that is integrated directly into a smartphone’s motherboard or system on chip (SoC). However, these new iterations of SIM card technology can also be the cause of the “SIM 1 Not Allowed” error on Samsung’s latest smartphones.
Users who encounter the “SIM 1 Not Allowed” error must first ensure that their SIM card is properly inserted. The location of the SIM card slot will vary by smartphone model, but the tray can be identified by the small hole used to eject it. Using the SIM removal tool or the unfolded paper clip, the user can easily eject the SIM tray and verify that the SIM card is properly inserted. The problem can also be caused by an incompatible SIM card as different phones have different size standards. To find specific details about the appropriate settings for a particular device, see the Quick Start Guide that came with your smartphone or contact the mobile service provider that supplied the SIM card. .
Settings may cause SIM card errors
Differences in the phone’s settings can also be the cause of the wrong SIM card on Android smartphones. Specifically, the “SIM 1 Not Allowed” error can occur regardless of whether the phone is set to use an eSIM or a physical SIM. If the phone wants to use an eSIM that does not require a physical SIM, it will reject any physical SIM inserted in the first SIM slot. To check this, open the Settings app and navigate to Mobile Settings. Here, users will be able to see if the phone is set to use an eSIM or a physical SIM and whether it is properly installed. If it is set up for eSIM, you can simply change the setting to recognize the physical SIM card. In some cases, this may require contacting your mobile phone service provider.
To use cellular service on any network, the mobile phone is assigned an IMEI number to identify the device. This is used when reporting a lost or stolen phone, if the “SIM 1 Not Allowed” error persists it could be because the IMEI number is blacklisted. To check this, there are many online databases that can be used to verify the status of the IMEI number. If the phone was recently purchased used, it may have been lost or stolen, which would make it impossible to activate on the cellular network. However, if the phone was purchased new recently, it is most likely a misnomer. For incorrect IMEI numbers or persistent “SIM 1 not allowed” errors, please contact the original point of purchase or the mobile phone service provider that supports the smartphone.
Fix “SIM is not configured for voice”
Another SIM related problem that can occur frequently on smartphones is the “SIM not configured for voice” error. This bug prevents users from making voice calls. There are several ways that users can solve the problem as the root cause is related to the SIM not connecting to the network provider. The easiest way to fix this is to turn airplane mode on and off. Airplane mode disconnects all network connections to the phone and forces them to reconnect when the phone is turned off. You can usually find the Airplane mode icon in the quick settings drop-down menu on Android phones.
Another potential fix for voice errors is to update your carrier service settings. To do this, open the Google Play Store and search for “Shipping services.’ It must be an app made by Google. clap ‘renewed‘ and check if the error is fixed. Users can also try some of the fixes mentioned for the “SIM 1 not allowed error” mentioned above. If all else fails, users may need to contact their carrier to resolve the issue with their smartphone.
Source: Samsung Support