Networking - SIM

Check Balance :

Celcom / Xpax : *124#

Digi : *126#

Maxis / Hotlink : *122#

Red1 Postpaid : *123#

Red1 PrePaid : *124#

Tune Talk : *133#

U Mobile : *118#

XOX : *132#

Check SIM Card No :

Celcom / Xpax : *124#

Digi : *126#

Maxis / Hotlink : *139#

Red1 Postpaid : *123#

Red1 PrePaid : *124#

Tune Talk : *111#

U Mobile : *118#

XOX : *132#

Symbol 2G

• GSM (Global System for Mobile Communications)
• Maximum Download Speed - 14.4Kb/s
• Maximum Upload Speed - 14.1Kb/s

Symbol G

• GPRS (General Packet Radio Service)
• Maximum Download Speed - 53.6Kb/s
• Maximum Upload Speed - 26.8Kb/s

Symbol E

• EDGE (Enhanced Data rates for GSM Evolution)
• Maximum Download Speed - 217.6Kb/s
• Maximum Upload Speed - 108.8Kb/s

Symbol 3G

• UMTS (Universal Mobile Telecommunications System)
• Maximum Download Speed - 384Kb/s
• Maximum Upload Speed - 128Kb/s

Symbol H

• HSPA (High-Speed Packet Access )
• Maximum Download Speed - 7.2Mb/s
• Maximum Upload Speed - 3.6Mb/s

Symbol H+

• HSPA+ (Evolved High-Speed Packet Access - Release 6)
• Maximum Download Speed - 14.4Mb/s
• Maximum Upload Speed - 5.76Mb/s

Symbol H+

• HSPA+ (Evolved High-Speed Packet Access - Release 7)
• Maximum Download Speed - 21.1Mb/s or 28.0Mb/s
• Maximum Upload Speed - 11.5Mb/s

Symbol H+

• HSPA+ (Evolved High-Speed Packet Access - Release 8)
• Maximum Download Speed - 42.2Mb/s
• Maximum Upload Speed - 11.5Mb/s

Symbol H+

• HSPA+ (Evolved High-Speed Packet Access - Release 9)
• Maximum Download Speed - 84.4Mb/s
• Maximum Upload Speed - 11.5Mb/s

Symbol H+

• HSPA+ (Evolved High-Speed Packet Access - Release 10)
• Maximum Download Speed - 168.8Mb/s
• Maximum Upload Speed - 23.0Mb/s

Symbol 4G

• LTE (Long Term Evolution)
• Maximum Download Speed - 100Mb/s
• Maximum Upload Speed - 50Mb/s

Symbol 4G

• LTE-A (Long Term Evolution - Advanced)
• Maximum Download Speed - 1Gb/s
• Maximum Upload Speed - 500Mb/s

Symbol G

• GPRS (General Packet Radio Service)
• Technology : 2.5G
• Data rates : 53.6 Kb/s

Symbol E

• EDGE (Enhanced Data Rates for GSM Evolution)
• Technology : 2.75G
• Data rates : 217.6 Kb/s

Symbol 3G

• 3G
• Technology : 3G
• Data rates : 384 Kb/s

Symbol T

• TD-SCDMA (Time Division Synchronous Code Division Multiple Access)
• Technology : 3G
• Data rates : 2 Mb/s

Symbol H

• HSDPA (High Speed Packet Access)
• Technology : 3G
• Data rates : 14.4 Mb/s

Symbol H+

• HSDPA+ (Evolved High Speed Packet Access)
• Technology : 3.75G
• Data rates : 42.2 Mb/s

Symbol LTE

• LTE/4G (Long Term Evolution)
• Technology : 4G
• Data rates : 299.6 Mb/s

Symbol 4G

• 4G
• Technology : 4G
• Data rates : 1 Gb/s

Symbol 4G+

• 4G Advance
• Technology : 4G
• Data rates : > 1 Gb/s

Symbol VoLTE

• Voice over LTE
• Technology : 4G LTE

Symbol R

• Roaming
• Internet Network Service

Result & Issue

Request timed out

• Server down or unreachable
• Firewall blocking the connectivity

Packet loss

• Network congestion
• Faulty hardware
• Bad network card
• Bad modem

Destination host unreachable

• IP not found

Troubleshooting

Check your network card

• ping 127.0.0.1
• ping localhost

Check connection between DNS

• ping 8.8.8.8 (Run ipconfig /flushdns command and check the TCP / IPV4 setting then try again)

Ping's help

• ping /?

Check Balance :

M1 : #100#

Singtel : *139#

Starhub : *113#

Check SIM Card No :

M1 : #100*2*2#

Singtel : *1955

Starhub : *113#

SU-MIMO

SU-MIMO was an optional technology that came along with 802.11n standards. Single User MIMO operates multiple streams of data must be sent or received between just one device at a time. This technology requires both the transmitting and receiving Wi-Fi radios support the MIMO technology, along with having multiple antennas.

MU-MIMO

While MU-MIMO only became available on wave 2 of 802.11ac standards. This technology enables Wi-Fi to simultaneously transmit those multiple streams to different Wi-Fi devices, instead of just one single device when compared to the older version (SU-MIMO). Another benefit to 'MU' is the Wi-Fi devices receiving one of the MIMO data streams doesn't have to have multiple antennas therefore even devices with single antenna will support this. However, the receiving Wi-Fi devices must support the MU-MIMO technology.

2.4GHz WIFI

Advantages :

• Low signal frequency
• Good penetration
• Long transmission distance

Disadvantages :

• A lot of interference
• Not stable

5GHz WIFI

Advantages :

• Less interference
• Net speed stability
• Support for higher wireless rates

Disadvantages :

• Poor penetration
• Short transmission distance

802.11

802.11a [ Wi-Fi 2 ]

802.11b [ Wi-Fi 1 ]

802.11g [ Wi-Fi 3 ]

802.11n [ Wi-Fi 4 ]

802.11ac [ Wi-Fi 5 ]

802.11ad

802.11ah

802.11aj

802.11ax [ Wi-Fi 6 ]

802.11ay