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Hi @Alumni,
Welcome to the community.
While we would recommend you use the official charger, because it uses a standardised Micro USB charger, any Micro USB charger should work fine and not cause any damage to your phone.
Please be aware however that Sony Mobile cannot be held responsible for any potential damage using a non-approved charger may cause should anything go wrong.
Based on the information you provided earlier it seems like the charger you received is for an international outlet. I would advise against using it as it may not support the correct voltage for your country.
As I mentioned earlier, any micro USB charger should be fine as it is standardised, we just cannot guarantee third party products is all.
If you do want a Sony one, there's no specific model you should be looking for. The UCH-20 will be fine for your purposes, just make sure it supports your wall sockets.
USA uses 110 volts and the rest of the world uses between 220 and 240 volts so it's not ideal to use a simple adapter in most cases.