Those days of heated discussions for GSM versus CDMA are gone now. We are now used to both the technologies. I am going to concentrate only on GSM phones in this blog.
Recently, one of my friends got his GSM sim card blocked because of invalid PUK code. After consultation with the service provider, we decided to replace the sim card but with the same number. Unfortunately, he has stored all his important numbers in the sim card only and not in the handset memory. He lost all important numbers in one minute. That triggered my thought process to prevent this kind of failures. Basically, in India if you are using CDMA phone, then you can keep a copy of your phone book at the server provided by your service provider. For example RWorld.
But, what if you are a GSM user? Well, outside India there are few mobile service providers which offer above mentioned feature online. For example, in Australia Optus allows it. You can store the phonebook from your sim card to the Optus server. AFAIK, no such service is provided by any Indian mobile providers. So, until it happens, what should GSM users do?
Well, there are lots of sim reader devices or sim backup utilities are available in the market. USB Sim card readers can be also useful and one can store the phonebook information on the PC. So, make sure you have backed up your data at least once.
Cheers,
Amol
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