![Even though the 5510 was revolutionary, it technically wasn't the first phone with an MP3 player. The Siemens SL45 introduced this feature almost 4 months before, in August 2001! : r/vintagemobilephones Even though the 5510 was revolutionary, it technically wasn't the first phone with an MP3 player. The Siemens SL45 introduced this feature almost 4 months before, in August 2001! : r/vintagemobilephones](https://i.redd.it/r6ec92ha0o671.jpg)
Even though the 5510 was revolutionary, it technically wasn't the first phone with an MP3 player. The Siemens SL45 introduced this feature almost 4 months before, in August 2001! : r/vintagemobilephones
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NG – T-Mobile Original Siemens SL45 SL45i Rechargeable Battery Compartment Cover Andeckung Silver: Amazon.de: Electronics & Photo
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Siemens SL45i Silver Gsm Unlocked Phone DISPLAY Type Monochrome graphic (101x80) BATTERY CAPACITY 550mAh WEIGHT 88g(3.10 oz)
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SL45/SL45i Modifications - Minijack audio, antenna removal, battery flashlight, car adapters and other tricks
![Buy Cadex 07-110-8590 | Cadex charger battery adapter. To be used with model V30145-K1310-X136-1 Li 3.6V 550 m ah battery, made for Siemens SL45, SL45i, SL42, 6688, 6686 Buy Cadex 07-110-8590 | Cadex charger battery adapter. To be used with model V30145-K1310-X136-1 Li 3.6V 550 m ah battery, made for Siemens SL45, SL45i, SL42, 6688, 6686](https://www.ameradio.com/img/products/21/Cadex-Adapters-s.jpg)
Buy Cadex 07-110-8590 | Cadex charger battery adapter. To be used with model V30145-K1310-X136-1 Li 3.6V 550 m ah battery, made for Siemens SL45, SL45i, SL42, 6688, 6686
![SL45/SL45i Modifications - Minijack audio, antenna removal, battery flashlight, car adapters and other tricks SL45/SL45i Modifications - Minijack audio, antenna removal, battery flashlight, car adapters and other tricks](http://sl45.sjostedt.no/images/fl1_full.jpg)