Dual SIM on any phone is common but it’s hard to conceive an idea of having iPhone 4 with three SIM cards. Ostensibly, USBFever has developed an adapter that allows you to install upto 3 SIM Cards on factory unlocked or carrier unlocked with ultrasn0w. The unlocked iPhone 4 lets you switch between the carrier operators of your choice without having to turn off or on your iPhone 4.

With the help of a chip, three SIM card of different carriers can easily be slipped inside this TRI-SIM card adaptor. Notably, this Tri SIM Card does not support Tri-Standby or Dual-Standby Mode but you can switch between them.
Features:
One iPhone (4G) with THREE SIM Cards (see note below)
No need to cut your SIM CARD
STK Menu (see installations below)
Comes with Crystal case to protect the Tri-sim card and your iPhone 4This accessory is compatible with:
iPhone 4G (Firmware 4.0.0)
iPhone 4G (Firmware 4.0.1)
iPhone 4G (Firmware 4.0.2)
How to Set-up Tri SIM inside your iPhone 4
Step 1: Navigate to Home -> settings -> Phone -> SIM Applications:
Step 2: Select your desire SIM card. If you don’t want it to select SIM card for you when the signal is low, please don’t select auto/SW.
Step 3: Note once you’ve chosen to another SIM card, it will have a message No SIM Card installed, please wait 1 or 2 minutes, it needs around 1 to 2 minutes to search, during this time, “No SIM” will appear in the top right of your iPhone’s screen.
This TRI-SIM Card for iPhone 4 with a Back Cover (Black or Clear) is available for $39.99, and can be purchased via USBFever website here.
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