Select STACK
[1] STACK 1 corresponds to SIM 1.
[2] STACK 2 corresponds to SIM 2.
On Single-SIM phones, Select STACK is skipped.
Select STACK changes a setting that affects other sessions. If Select STACK is somehow skipped, the STACK previously chosen with Select STACK will be used.
LDU FLAG
Live Demo Unit Flag.
LDU FLAG : 1
This device is a Live Demo Unit intended only to be displayed in a store, and is not meant for use with cellular.
IMEI
IMEI.
IMEI : LDU
This device is a Live Demo Unit intended only to be displayed in a store, and is not meant for use with cellular.
Cause
Cause is equivalent to You were logged out due to ... or Logging in failed due to ... where ... is the Cause. The Cause is contained in a message sent by the carrier. What the phone does depends on what's in the message. The easiest way to clear a persistent Cause is to enable Airplane Mode then disable it again.
Explained causes
- GMM Cause - Error logging in for getting data to towers to the phone.
- MM Cause - Error logging in for getting calls and similar services to towers to the phone.
- PS/CS Cause - Error logging in for 4G to towers to the phone.
- REJECT displayed instead of Cause - The phone is currently on 2G. It's simply renamed, Causes continue to work.
Below are simple descriptions of cause values. This is by no means a comprehensive list. For a list in the specification itself, refer to this section.
Cause 2
Username does not exist. The username stored in the SIM was used, but there is no user account in the carrier's side with that username. Perhaps the account was deleted. This cause should not be used if the SIM is meant for some other carrier.
A notification that contains the text SIM not provisioned may be created by this Cause.
Cause 3
The SIM contains a username and a password.
The username is sent directly, unless a temporary username was assigned, then the temporary username is used instead.
The password is not sent directly. During the login procedure, the carrier sends a random number, and the phone gives it to the SIM. The SIM does math with the password and the random number, then gives the result to the phone. The phone sends it to the carrier. If something goes wrong, there's Cause 3.
A notification similar to SIM not allowed may be created by this Cause.
Cause 5
There is no SIM in the phone, an emergency call was made, the phone used its unique ID instead of the username stored in the SIM.
However, this is not allowed by the carrier.
Without a SIM, the phone does not connect to any tower until an emergency call is made. Though the phone does not connect, the phone measures the signal and loads settings from the tower, so signal bars remain. Carriers might or might not allow SIM-less emergency calls. It is country/carrier specific.
Cause 6
Used if the phone is blacklisted (stolen/debt/etc), or not whitelisted by the country (where applicable), remember, the message containing Cause 6 is a message sent by the carrier, the carrier should be contacted if this is erroneous.
A notification that contains the text Phone not allowed or SIM not allowed may be created by this Cause.
Cause 11
The first 6 digits of the SIM's username identifies the SIM's carrier. The phone tried to log in to a carrier that the SIM is not meant for. Also, the carrier the phone that the phone tried to log in to is not collaborating with the SIM's carrier. After the phone receives this cause, the carrier is stored in the forbidden public land mobile networks file inside the SIM so the phone doesn't try again. The carrier can still be selected manually in the phone's settings.
Cause 15
It can be used for its intended purpose, or it can be generic, given because 'it just works'.
Cause 19
Issue in or near the APN. Ensure APN settings are not misconfigured.
Causes in the specification
A list of causes and a description is available, in the specification(elsewhere.)
For 2G
See GSM 04.08 version 7.8.0 Release 1998
For 3G
See TS 24.008
For 4G
See TS 24.301
For 5G
See TS 24.501
RAT
Radio Access Technology and type of call.
- RAT: MO 2G - mobile originating, 2G, the call originates from your mobile, you called someone.
- RAT: MT 2G - mobile terminating, 2G, the call terminates at your mobile, someone called you.
- RAT: MO 3G - mobile originating, 3G, the call originates from your mobile, you called someone.
- RAT: MT 3G - mobile terminating, 3G, the call terminates at your mobile, someone called you.
- RAT: MO VoLTE - mobile originating, a call made on 4G without using 3G/2G, the call originates from your mobile, you called someone.
- RAT: MT VoLTE - mobile terminating, a call made on 4G without using 3G/2G, the call terminates at your mobile, someone called you.
- RAT: MO VoNR - mobile originating, a call made on 5G without using 4G/3G/2G for it, the call originates from your mobile, you called someone.
- RAT: MT VoNR - mobile terminating, a call made on 5G without using 4G/3G/2G for it, the call terminates at your mobile, someone called you.
Codec
≈Audio format while in a call. MP2, MP3, and a lot of others are not used. Codecs that might be used (not an exhaustive list) are:
- GSM_HR(8K)
- GSM_FR(8K)
- GSM_EFR(8K)
- AMR_NB(8K)
- AMR_WB(16K)
- EVS_NB(8K)
- EVS_WB(16K)
- EVS_SWB(32K)
- EVS_FB(48K)
where 8K, 16K, 32K, and 48K are sample rates.
VC:DL : _1_, UL : _2_
Bitrate while in a call, shown if ambiguous. A higher bitrate creates a better approximation but not much is required, there's generally only a need to transmit voice, not music. Also, voice calls are generally prioritized over data, so an excessive bitrate may cause congestion.
RB(DL/UL)
For LTE. If a phone leaves LTE, it remains in the menu.
- DL refers to the downlink, tower->phone, i.e. downloading.
- UL refers to the uplink, phone->tower, i.e. uploading.
There's 0.18MHz of radiowaves used per RB.
RB(DL/UL) displays how many radiowaves are currently used. Only the PCell is taken into account. For radiowaves that can be used, see Band and BW.
It is reset if the phone enters the IDLE state.
Max RB(DL/UL)
For LTE. If a phone leaves LTE, it remains in the menu.
- DL refers to the downlink, tower->phone, i.e. downloading.
- UL refers to the uplink, phone->tower, i.e. uploading.
There's 0.18MHz of radiowaves used per RB, e.g. 100 would be 18MHz, normally, if there's 20MHz for downloading, 18MHz is used and the remaining 1MHz in each side provides a margin for error.
Max RB(DL/UL) is a representation of the maximum number of radiowaves used while connected. Only the PCell is taken into account.
It is reset if the phone enters the IDLE state.
A change in frequencies while connected doesn't reset it. This means Max RB can display a value seemingly beyond the BW of the latest PCell.
MIPI
The modem sends, receives, and processes coordinates of the signal. Other components do the rest. Some or most of which are compliant with the MIPI RFFE specification.
MIPI TEST SUCCESS
Older version. Indicates that tested components are working.
MIPI TEST SUCCESS(_1_)
Newer version. Indicates that tested componentss are working.
_1_ - Phone-specific
_1_ is phone-specific. For example, it's 6 on the S21, 12 on the S22.
MIPI FAIL:0x_1_,0x_2_
Older version. Indicates that the component that has the product ID _1_ and the manufacturer ID _2_ is not working correctly.
The component itself might not be broken. For example, if several MIPI FAILs are displayed, check the daughterboard.
If "MIPI FAIL" appears, the correct way to fix it is to fix the underlying hardware issue. Attempts to re-enable cellular in software may cause cellular to not work correctly.
_2_ - Manufacturer ID
Identifies the manufacturer. Refer to https://mid.mipi.org/ for a list of manufacturer IDs. What is 987 in the software would be 09h 87h over there.
_1_ - Product ID
Identifies the product. Refer to documents from the manufacturer describing the component. The component's product ID may be included.
MIPI FAIL(_1_):0x_2_,0x_3_,0x_4_,0x_5_
Newer version.
_1_ - Phone-specific
The _1_ is phone-specific. Examples include 6 on the S21, 12 on the S22.
_3_ - USID
USID.
_4_ - Product ID
Identifies the product. Refer to documents from the manufacturer describing the component. The component's product ID may be included.
_5_ - Manufacturer ID
Identifies the manufacturer. Refer to https://mid.mipi.org/ for a list of manufacturer IDs. What is 987 in the software would be 09h 87h over there.
S5100 ASV
Each group is a table of frequencies and voltages. The higher this number is, the more undervolting is done by the factory. Other phones may support more or less undervolting. S5100 ASV requires the S5100 hardware.
IMEI Status
Device-side status of the IMEI/Certificate.
IMEI Status: OK
The IMEI is available and certified. The phone may still be blacklisted, which appears elsewhere as a Cause of 6/6 after the phone attempts to use services.
IMEI Status: NG
The IMEI or the certificate is damaged. Unless a backup is available, the phone shall be taken to the phone's authorized service center. Though unauthorized repair shops may claim to be able to fix it, it would be with temporary workarounds at most. To get it fixed, take it to the phone's authorized service center.