JUST CONVERT YOUR OLD 3G PHONE WITH THE NEW 4G.
Open your phone's dialer and start typing this code *#*#4636#*#
On
running the above code you'll land into a testing screen where you'll
see four options phone information, battery information, usage
statistics, and Wi-Fi information.
Click on ‘phone information.'
Scroll down until you see ‘set preferred network type.'
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From the preferred network type, select LTE/GSM/CDMA auto (PRL)
Now, scroll down and hit the update button.
Voila!
your phone is now 4G capable. If there's an error while updating try
choosing another network type which has the LTE option.
STEP 1
STEP 2
STEP 3
STEP 4
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