They do not degrade over time. If you are experiencing issues contact your provider.
As long as one can obtain a SIM card from any cell carrier, an unlocked mobile phone can be used on any carrier. Also, if one is travelling overseas and obtain an international SIM card, calls can be made much more cheaply.
How much is the calaxy phone check
A sim card can be purchased from almost any mobile phone retailer and retail stores like Wal-mart or Target. Generally, the motorolla sim card can cost a consumer on average $10.
MP3 or MP4 songs take IGB on a mobile phone
That depends on your mobile data plan.
To top up my mobile phone I dial 453 and someone will tell you how much credit you have and then ask you to press a certain number to top up. Then you just need to either dial or tell them credit card details. To avoid any mistakes the person on the phone will repeat what you have dialed/said and you will answer yes or no to weather it is right. They also take the security code of your credit card and you tell them how much credit you want. It is an automatic system there isn't a real person talking to you. This way is free and quick.
It depends for exaple some chargers have a light on it, that takes energy not much but it does other then that no.
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yes of course mobile phone software only but making mobile phone needs experience and android base is much better than java.
It varies depending on the phone company
about $30.00
$20.00